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♪♪

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-The oceans
are full of wonder,

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an alien world
waiting to be explored.

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A place of
extraordinary life-forms

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with intriguing social lives

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and incredible intelligence.

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[ Dolphin squeaking ]

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To reveal their secrets,

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a hidden team goes undercover.

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Spy creatures.

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♪♪

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The most innovative
undersea robots in the world.

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They not only look like
the animals they film,

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they interact with them
as no human can.

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♪♪

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Equipped with hidden cameras...

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♪♪

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...they reveal
their astonishing lives.

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As our spies join
their undersea world,

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they shed light on some of
the mysteries of the deep.

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♪♪

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Last time, our spies looked
at how ocean creatures think.

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This time, they explore
how they feel.

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As we dive into the world
of animal emotions,

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we can't help but be moved,

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for their feelings aren't
that different from our own.

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♪♪

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Surfing dolphins
certainly seem to be having fun.

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♪♪

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Proving it is another matter.

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To investigate
what they're feeling,

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a new spy will join them.

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Spy Dolphin will be surfing
with the best.

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♪♪

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It not only swims
like a dolphin,

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extra thrust helps it power
through the waves.

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[ Squeaking ]

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Dolphins are famed
for their intelligence,

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but how they feel
may be just as important.

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To find out more, Spy Dolphin
will join them in the waves,

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its camera eye capturing
what they experience.

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Not bad for the first attempt.

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Dolphins will play like this
for hours.

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But our spy is struggling
to keep up.

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♪♪

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A wipeout.

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[ Dolphins squeaking ]

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Well, there's always
another wave.

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Like human surfers,
dolphins wait for the big one.

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And like us,
surfing is a communal event.

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By playing and having fun,
they learn social skills

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and get to know
what others are feeling.

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All while trying to catch
the perfect wave.

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♪♪

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For Spy Dolphin,
it's a chance to try again.

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♪♪

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For real dolphins,
it's a chance for some tricks.

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♪♪

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What dolphins feel
when surfing

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may not be that far
from what we feel.

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♪♪

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When we surf, we feel
a surge of endorphins --

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feel-good hormones
found in other animals,

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including dolphins.

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♪♪

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Endorphins help build
friendships too.

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♪♪

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And what could be better
than surfing with friends?

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♪♪

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No longer a newbie,
our spy is now a surfing pro.

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But it takes a real dolphin
to experience the joy.

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♪♪

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French Polynesia
is the next destination

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for our surf-loving spy.

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This time he's investigating
the emotional life

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of humpback whales.

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Each winter, they travel
over 3,000 miles from Antarctica

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to reach these warmer waters.

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They come to this safe haven
to find a mate

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or nurse their young.

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But this is a humpback
like no other.

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One that can film.

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Together they'll investigate the
playful nature of young whales.

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A lively duo on a mission.

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They needn't wait long.

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A calf, just two months old.

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This is how a whale calf plays.

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[ Whale singing ]

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To find out more, our spy must
make its acquaintance.

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[ Whale singing ]

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♪♪

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Whales are inquisitive,

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their young
the most curious of all.

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♪♪

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He certainly seems welcoming.
A promising sign.

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[ Singing continues ]

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♪♪

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Just when the encounter
seems over,

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he comes back for more.

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Again, another close pass,

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ending with a playful swish
of his tail.

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♪♪

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Play is an important part
of a young calf's life.

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[ Singing continues ]

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So, what will happen
when he meets Spy Whale...

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♪♪

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...a spy creature
his own size?

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♪♪

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Already the calf
is reacting differently.

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♪♪

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His approach is slower.

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And he rubs alongside,
as he would another calf.

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♪♪

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He also shows off by rolling
and flashing his belly.

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♪♪

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Slapping his fins is
an invitation to join in.

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♪♪

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Twisting and rolling suggests
he wants more than to play.

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He wants to be friends.

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Adults make the same
welcoming gestures.

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♪♪

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Through play, he learns the
skills he'll need later in life.

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♪♪

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Then, as quickly as it started,
introductions are over.

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But there's plenty more
for our spies to see.

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Spy Whale captures the moment
the calf's mother returns.

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[ Whale singing ]

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He dives down to greet her.

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♪♪

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After all that play, perhaps
the strongest emotion of all --

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the love between a mother
and her young.

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♪♪

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♪♪

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It's this deep connection
that will keep the calf safe

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on their long journey
back to Antarctica.

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[ Singing continues ]

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♪♪

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Off the coast of Australia,

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there are more emotions
to explore.

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Giant cuttlefish are never ones
to hide their feelings.

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In fact, they're clear
for all to see.

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Their ever-changing moods
are displayed on their skin.

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To find out more, a doppelganger
has infiltrated the gathering.

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One of the most sophisticated
spies ever made.

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Its back conceals a screen
that can replay the patterns

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expressed by the cuttlefish.

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♪♪

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How will this imposter
be received?

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♪♪

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It's already
attracting attention.

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The skin of the cuttlefish
shows his emotional state.

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♪♪

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Linked to his brain,

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thousands of pigment cells
expand and contract.

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These chromatophores
show what's on his mind.

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Our spy's screen
responds in kind...

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...playing the patterns
displayed by males.

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A first contact
with an alien mind.

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♪♪

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He turns to check
if rivals are watching.

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As he does, the patterns switch
to his other side,

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the one that faces our spy.

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♪♪

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Then a clue
to what he's feeling.

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He approaches our spy
from the side.

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It's something he'd only do
to another male.

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♪♪

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It seems our spy is displaying
a provocative message,

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that of a rival male.

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By approaching from the side,
he avoids a danger

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he's expecting --
a male's sharp mouthparts.

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♪♪

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As our spy isn't aggressive,
the cuttlefish is intrigued.

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♪♪

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The spy
then changes its display

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to the more neutral patterns
of a female.

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♪♪

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The male is even more curious.

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In female guise, our spy gets
a very different reaction.

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He now dares approach
from the front.

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♪♪

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A sure sign he knows
he's not with a male.

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♪♪

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But a female cuttlefish
attracts many admirers.

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♪♪

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Ones he must keep at bay.

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He returns to our spy.

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♪♪

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A unique relationship
has been formed...

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♪♪

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...one that will reveal more
about the emotional lives

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of these
extraordinary creatures.

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Cuttlefish aren't
the only sea creatures

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to wear their feelings
on their skin.

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The colors of octopus
also change with their moods.

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Spy Octopus couldn't
possibly compete,

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but it may find
someone who can.

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♪♪

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The mimic octopus is
the trickster of the ocean.

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He not only changes his skin
color with his emotional state.

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He changes to match
his surroundings too.

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But our spy discovers
that's just the start.

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It even re-creates
the grains of sand...

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...raising its skin
to match the texture.

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That's not all.

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♪♪

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Among sea grass, he'll even
mirror its shape and movement.

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♪♪

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00:19:55,700 --> 00:19:58,566
A trick to fool his enemies.

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00:20:01,833 --> 00:20:06,733
But as impersonations go,
he's just warming up.

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♪♪

212
00:20:12,933 --> 00:20:16,933
For his next trick,
he needs inspiration.

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00:20:16,933 --> 00:20:22,133
♪♪

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00:20:22,133 --> 00:20:26,100
Hidden in the sand
is another vanishing act.

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00:20:28,666 --> 00:20:31,766
A poisonous flatfish.

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00:20:31,766 --> 00:20:37,000
♪♪

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00:20:37,000 --> 00:20:40,933
Impersonate this,
and he can avoid being eaten.

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00:20:43,300 --> 00:20:45,733
Not bad at all.

219
00:20:45,733 --> 00:20:48,200
But will it fool
the real thing?

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♪♪

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00:20:56,766 --> 00:21:03,100
By staying in character,
the mimic has gained an admirer.

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00:21:03,100 --> 00:21:07,366
The flatfish is looking
for a mate.

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00:21:07,366 --> 00:21:17,233
♪♪

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00:21:17,233 --> 00:21:20,433
This relationship
is dead in the water.

225
00:21:27,200 --> 00:21:31,933
But the mimic has plenty
more tricks to pull.

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00:21:31,933 --> 00:21:36,866
Constantly changing persona
confuses predators.

227
00:21:39,500 --> 00:21:44,266
New inspiration
is never far away.

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The deadlier the better.

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00:21:48,533 --> 00:21:53,300
A lionfish,
armed with 18 venomous spines.

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00:21:55,966 --> 00:21:59,033
But is octopus
up for the challenge?

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♪♪

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00:22:05,133 --> 00:22:07,966
He'll certainly give it a go.

233
00:22:07,966 --> 00:22:22,566
♪♪

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00:22:22,566 --> 00:22:27,700
He flattens his tentacles
to mimic the lionfish spines.

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00:22:31,266 --> 00:22:35,100
And changes his shape
and color too.

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♪♪

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Enough to fool an enemy.

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♪♪

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00:22:49,066 --> 00:22:52,433
But it's not the end
of his repertoire.

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00:22:54,800 --> 00:22:59,600
Sea snakes are among the world's
most venomous snakes.

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♪♪

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00:23:05,666 --> 00:23:08,633
Even though
they're surprisingly docile,

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their banded appearance
still keeps danger away.

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00:23:16,333 --> 00:23:19,366
It's certainly worth mimicking.

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♪♪

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So far, over 15
different impersonations

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have been discovered.

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♪♪

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00:23:36,333 --> 00:23:39,333
But has he another to add
to the list?

250
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A passable imitation
of our very own spy.

251
00:23:56,200 --> 00:23:58,266
[ Birds squawking ]

252
00:24:01,866 --> 00:24:05,333
In New Zealand,
it's an emotional time

253
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for a colony of fur seals.

254
00:24:09,000 --> 00:24:10,066
[ Seals barking ]

255
00:24:10,066 --> 00:24:12,466
The pups are three months old,

256
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and they've just left
their mother's side.

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00:24:15,766 --> 00:24:21,633
Their playground is a rock pool,
safe from the ocean waves.

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00:24:27,266 --> 00:24:31,533
At this sensitive time,
Spy Seal is here to find out

259
00:24:31,533 --> 00:24:33,433
what they might be feeling.

260
00:24:33,433 --> 00:24:35,800
[ Seals barking ]

261
00:24:35,800 --> 00:24:41,366
Like us, their emotions
are influenced by hormones,

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00:24:41,366 --> 00:24:43,933
the same as those
that govern our own feelings.

263
00:24:53,700 --> 00:24:58,166
Spy Seal watches as they learn
the social skills

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that will help them
later in life.

265
00:25:07,500 --> 00:25:12,633
But not all are ready
for play school.

266
00:25:12,633 --> 00:25:16,133
This pup is a few weeks
behind the others.

267
00:25:16,133 --> 00:25:20,100
He has yet to leave
his mother's side.

268
00:25:20,100 --> 00:25:26,966
♪♪

269
00:25:26,966 --> 00:25:29,833
But that's about to change.

270
00:25:29,833 --> 00:25:32,533
[ Seals barking ]

271
00:25:32,533 --> 00:25:36,933
The fear of missing out makes
him want to join the other pups.

272
00:25:39,266 --> 00:25:43,700
His first tentative steps
towards independence.

273
00:25:45,600 --> 00:25:48,900
It's the sign his mother
was waiting for.

274
00:25:51,200 --> 00:25:55,166
She slips away unseen.

275
00:25:56,333 --> 00:25:59,333
He'll be left alone for days.

276
00:25:59,333 --> 00:26:05,700
♪♪

277
00:26:05,700 --> 00:26:07,500
It's a worrying time.

278
00:26:11,033 --> 00:26:15,266
He's never felt
loneliness before.

279
00:26:20,233 --> 00:26:23,600
But Spy Pup is near
and welcoming.

280
00:26:27,933 --> 00:26:32,666
A comfort for a pup
whose mother has gone.

281
00:26:34,800 --> 00:26:36,766
[ Seals barking ]

282
00:26:39,033 --> 00:26:42,900
His next step
is to join the playgroup.

283
00:26:46,033 --> 00:26:48,933
First, he must summon up
the courage.

284
00:26:48,933 --> 00:27:00,433
♪♪

285
00:27:00,433 --> 00:27:04,866
As the youngest pup,
he's the most vulnerable.

286
00:27:04,866 --> 00:27:09,200
And the weather is changing
for the worse.

287
00:27:11,766 --> 00:27:14,933
Our spy is first
to feel its force.

288
00:27:14,933 --> 00:27:18,100
And this is just the start.

289
00:27:18,100 --> 00:27:23,266
♪♪

290
00:27:23,266 --> 00:27:26,866
Those more experienced
head to the shore.

291
00:27:28,200 --> 00:27:30,066
[ Barking ]

292
00:27:30,066 --> 00:27:34,133
But the young pup has yet
to learn the dangers.

293
00:27:34,133 --> 00:27:40,300
♪♪

294
00:27:40,300 --> 00:27:44,400
He's now at the mercy
of the waves.

295
00:27:44,400 --> 00:27:50,300
♪♪

296
00:27:50,300 --> 00:27:52,433
He's not the only one.

297
00:27:55,866 --> 00:27:58,566
Spy Seal joins him in the surf.

298
00:27:58,566 --> 00:28:14,900
♪♪

299
00:28:14,900 --> 00:28:18,400
But waves wash both ways.

300
00:28:23,933 --> 00:28:27,233
And the pup makes it out
as well.

301
00:28:29,900 --> 00:28:34,633
But his playmates have abandoned
the beaches to head inland.

302
00:28:37,500 --> 00:28:40,366
He'll struggle to catch up
with them now.

303
00:28:40,366 --> 00:28:49,200
♪♪

304
00:28:49,200 --> 00:28:53,066
They're heading upstream
for somewhere safer to play.

305
00:28:53,066 --> 00:28:58,066
♪♪

306
00:28:58,066 --> 00:29:00,500
He's alone once more.

307
00:29:00,500 --> 00:29:05,500
♪♪

308
00:29:05,500 --> 00:29:07,600
[ Barks ]

309
00:29:10,033 --> 00:29:12,900
Although not completely alone.

310
00:29:12,900 --> 00:29:14,966
[ Barks ]

311
00:29:14,966 --> 00:29:18,700
A companion
to raise his spirits.

312
00:29:18,700 --> 00:29:27,966
♪♪

313
00:29:27,966 --> 00:29:31,666
But it's the real pups
he needs to find.

314
00:29:31,666 --> 00:29:34,866
Where he's going,
our spy can't follow.

315
00:29:36,600 --> 00:29:40,533
The pup
will struggle on alone.

316
00:29:42,866 --> 00:29:46,066
To cover the challenges
he faces,

317
00:29:46,066 --> 00:29:49,800
rock cams
take over filming duties.

318
00:29:49,800 --> 00:29:53,000
They're hidden
all along the way.

319
00:29:57,000 --> 00:29:59,400
[ Barking ]

320
00:29:59,400 --> 00:30:11,366
♪♪

321
00:30:11,366 --> 00:30:14,966
The pup is undaunted,

322
00:30:14,966 --> 00:30:19,233
despite facing one hurdle
after another.

323
00:30:22,266 --> 00:30:24,300
[ Barking ]

324
00:30:24,300 --> 00:30:32,500
♪♪

325
00:30:32,500 --> 00:30:34,400
The first trial is over,

326
00:30:34,400 --> 00:30:38,266
but his emotions
will soon be tested once more.

327
00:30:41,966 --> 00:30:44,566
The feelings we share
with other life

328
00:30:44,566 --> 00:30:48,933
are found among
all marine mammals,

329
00:30:48,933 --> 00:30:54,000
including a visitor to the
coral reefs of the Caribbean.

330
00:30:58,333 --> 00:30:59,966
A manatee.

331
00:31:07,166 --> 00:31:10,400
They come here purely
to socialize,

332
00:31:10,400 --> 00:31:14,000
having spent most of their day
out feeding.

333
00:31:14,000 --> 00:31:19,033
It's somewhere where friends
and acquaintances can meet.

334
00:31:21,900 --> 00:31:25,800
A very special visitor
is about to join them.

335
00:31:29,266 --> 00:31:32,266
A spy creature
seeking company.

336
00:31:36,633 --> 00:31:39,700
But what will
the real manatee think?

337
00:31:39,700 --> 00:31:48,933
♪♪

338
00:31:48,933 --> 00:31:52,466
It's clear he's curious.

339
00:31:52,466 --> 00:31:56,533
Spies based on youngsters
usually go down well.

340
00:31:56,533 --> 00:32:10,600
♪♪

341
00:32:10,600 --> 00:32:15,933
Inspection over, Spy Manatee
is off to a good start.

342
00:32:22,366 --> 00:32:26,166
The manatees closest
living relatives are elephants.

343
00:32:26,166 --> 00:32:27,533
[ Manatees singing ]

344
00:32:27,533 --> 00:32:31,733
It appears they share
their emotional side too.

345
00:32:33,566 --> 00:32:39,000
Our spy soon finds out how
affectionate they really are.

346
00:32:39,000 --> 00:32:45,000
♪♪

347
00:32:45,000 --> 00:32:47,866
Mouths formed
to graze on sea grass

348
00:32:47,866 --> 00:32:52,300
here offer a gentle caress.

349
00:32:52,300 --> 00:32:55,200
And even a slobbery kiss.

350
00:32:55,200 --> 00:33:04,233
♪♪

351
00:33:04,233 --> 00:33:07,233
Why they enjoy these
touchy-feely moments

352
00:33:07,233 --> 00:33:08,866
soon becomes clear.

353
00:33:12,333 --> 00:33:17,066
Hairs that cover their body
are highly sensitive to touch.

354
00:33:17,066 --> 00:33:22,466
♪♪

355
00:33:22,466 --> 00:33:25,100
Who they groom
and for how long

356
00:33:25,100 --> 00:33:29,400
depends on the strength
of their relationships,

357
00:33:29,400 --> 00:33:33,933
whether they are close friends
or looking for a mate.

358
00:33:36,800 --> 00:33:39,766
Often they enjoy
just hanging out together.

359
00:33:39,766 --> 00:33:44,966
♪♪

360
00:33:51,300 --> 00:33:55,600
When socializing's over,
they take it up a notch.

361
00:33:55,600 --> 00:34:10,133
♪♪

362
00:34:10,133 --> 00:34:14,233
For a youngster,
a game of chase.

363
00:34:14,233 --> 00:34:23,233
♪♪

364
00:34:23,233 --> 00:34:28,133
But the manatee's favorite
pastime is just chilling out.

365
00:34:30,233 --> 00:34:34,533
When our spy does the same,
it attracts attention again.

366
00:34:34,533 --> 00:34:53,933
♪♪

367
00:34:53,933 --> 00:34:58,266
This time it receives
an affectionate once-over.

368
00:34:58,266 --> 00:35:04,166
♪♪

369
00:35:04,166 --> 00:35:07,400
And even a manatee kiss.

370
00:35:09,033 --> 00:35:13,700
It's the ultimate sign
of acceptance.

371
00:35:13,700 --> 00:35:16,800
Just what we wish
for our spy.

372
00:35:21,100 --> 00:35:22,900
Back in Australia,

373
00:35:22,900 --> 00:35:26,733
emotions are still running high
among the cuttlefish.

374
00:35:29,066 --> 00:35:33,866
As before, our spy is being
guarded by the jealous male.

375
00:35:36,833 --> 00:35:43,000
♪♪

376
00:35:43,000 --> 00:35:46,866
It's still displaying the
subdued patterns of a female.

377
00:35:46,866 --> 00:35:52,566
♪♪

378
00:35:52,566 --> 00:35:54,266
But in the breeding season,

379
00:35:54,266 --> 00:35:58,466
many other males
are also looking for a mate.

380
00:36:02,600 --> 00:36:06,366
It's a full-time job
keeping them at bay.

381
00:36:06,366 --> 00:36:15,766
♪♪

382
00:36:15,766 --> 00:36:18,466
But some are ready
to take him on,

383
00:36:18,466 --> 00:36:22,433
carefully avoiding
his sharp mouthparts.

384
00:36:22,433 --> 00:36:25,433
Eight arms
soon toss him away.

385
00:36:25,433 --> 00:36:31,133
♪♪

386
00:36:31,133 --> 00:36:33,233
But he comes back for more...

387
00:36:33,233 --> 00:36:43,733
♪♪

388
00:36:43,733 --> 00:36:47,366
...and is dealt with
just as decisively.

389
00:36:47,366 --> 00:36:57,200
♪♪

390
00:36:57,200 --> 00:37:00,133
The male returns to our spy.

391
00:37:00,133 --> 00:37:05,200
♪♪

392
00:37:05,200 --> 00:37:10,733
To calm things down, it switches
its display to that of a male.

393
00:37:10,733 --> 00:37:16,433
♪♪

394
00:37:16,433 --> 00:37:18,700
That takes him by surprise,

395
00:37:18,700 --> 00:37:22,600
giving our spy the chance
to leave him to it.

396
00:37:26,900 --> 00:37:31,166
The cuttlefish are left fighting
it out among themselves.

397
00:37:33,000 --> 00:37:35,066
Even they have testosterone,

398
00:37:35,066 --> 00:37:38,566
the hormone that charges
our own aggression.

399
00:37:38,566 --> 00:37:53,200
♪♪

400
00:37:53,200 --> 00:37:57,233
Across the reef,
tensions are rising.

401
00:37:58,800 --> 00:38:01,166
Wherever our spy goes,

402
00:38:01,166 --> 00:38:05,133
it finds females
jealously guarded by males.

403
00:38:11,900 --> 00:38:16,000
The cuttlefish hides her
beneath his flowing mantle...

404
00:38:18,333 --> 00:38:20,866
...always just out of view.

405
00:38:25,566 --> 00:38:29,766
But she's a reluctant partner
and tries to get away.

406
00:38:33,966 --> 00:38:38,266
By squirting ink she creates
a cloud of confusion.

407
00:38:43,633 --> 00:38:46,800
She escapes unseen.

408
00:38:51,300 --> 00:38:55,700
With so much rivalry,
the cuttlefish find crafty ways

409
00:38:55,700 --> 00:38:58,300
to come out on top.

410
00:38:58,300 --> 00:39:04,100
Younger, smaller males
use a sneaky trick.

411
00:39:07,866 --> 00:39:12,000
Male tentacles are longer
than females,

412
00:39:12,000 --> 00:39:15,800
so he tucks them away
to disguises his sex.

413
00:39:18,133 --> 00:39:22,666
His skin patterns also
mimic those of a female.

414
00:39:25,633 --> 00:39:29,100
In this way
he sneaks in unnoticed

415
00:39:29,100 --> 00:39:31,700
to fool the dominant males.

416
00:39:34,333 --> 00:39:36,066
As they fight it out,

417
00:39:36,066 --> 00:39:39,500
the imposter hovers
on the sidelines,

418
00:39:39,500 --> 00:39:43,400
waiting for his chance.

419
00:39:46,533 --> 00:39:51,200
When the female wriggles free,
his moment arrives.

420
00:39:54,400 --> 00:39:56,800
Just what he was hoping for.

421
00:39:59,366 --> 00:40:01,666
He makes his move...

422
00:40:04,533 --> 00:40:08,666
...slinking past
the bigger male

423
00:40:08,666 --> 00:40:11,000
and stealing his female.

424
00:40:11,000 --> 00:40:17,633
♪♪

425
00:40:17,633 --> 00:40:20,766
It's a kidnap in plain sight.

426
00:40:20,766 --> 00:40:25,333
♪♪

427
00:40:25,333 --> 00:40:27,466
Beneath their embrace,

428
00:40:27,466 --> 00:40:30,933
he gives her a present
to fertilize her eggs --

429
00:40:30,933 --> 00:40:34,133
a spermatophore
she'll keep for later.

430
00:40:36,500 --> 00:40:39,033
But the female
can be sneaky too.

431
00:40:39,033 --> 00:40:44,733
She'll mate with others and keep
their gifts of sperm as well.

432
00:40:44,733 --> 00:40:49,566
She will choose which she'll use
to father the next generation.

433
00:40:53,700 --> 00:40:58,233
Among cuttlefish, it seems
all's fair in love and war.

434
00:41:04,733 --> 00:41:09,000
Everywhere, courtship is a time
of heightened emotions.

435
00:41:11,933 --> 00:41:15,766
The tidal mudflats of Japan
are the mating grounds

436
00:41:15,766 --> 00:41:18,266
of some very odd fish.

437
00:41:20,466 --> 00:41:24,966
Ones that spend
most of their lives on land.

438
00:41:29,533 --> 00:41:34,366
This fish out of water
is a blue-spotted mudskipper.

439
00:41:34,366 --> 00:41:39,633
♪♪

440
00:41:39,633 --> 00:41:42,066
He breaths by gulping air

441
00:41:42,066 --> 00:41:45,333
and absorbing oxygen
through his mouth.

442
00:41:49,400 --> 00:41:53,333
By keeping wet, he can
even breath through his skin.

443
00:41:53,333 --> 00:41:59,233
♪♪

444
00:41:59,233 --> 00:42:03,733
His courtship rituals
are as bizarre as his looks.

445
00:42:07,400 --> 00:42:11,500
It takes a very special spy
to film them.

446
00:42:14,166 --> 00:42:18,400
Mud is an occupational hazard,

447
00:42:18,400 --> 00:42:21,800
so its camera
has a built-in lens cap.

448
00:42:24,633 --> 00:42:26,566
As the day warms up,

449
00:42:26,566 --> 00:42:30,066
it spies a female
venturing from her burrow.

450
00:42:36,466 --> 00:42:40,100
She's on the lookout
for an eligible partner.

451
00:42:45,233 --> 00:42:48,566
The bigger the better.

452
00:42:48,566 --> 00:42:52,300
Our spy fits the bill.

453
00:42:53,800 --> 00:42:58,000
Waving her fin like a flag
is another good sign.

454
00:42:58,000 --> 00:43:01,800
Our spy waves back.

455
00:43:01,800 --> 00:43:08,033
♪♪

456
00:43:08,033 --> 00:43:11,200
But this is where
it all goes wrong.

457
00:43:15,000 --> 00:43:18,133
There are plenty more males
to choose from.

458
00:43:20,333 --> 00:43:24,333
Spy Mudskipper
has serious competition.

459
00:43:27,300 --> 00:43:31,600
And their flag-waving
is far more seductive.

460
00:43:34,133 --> 00:43:38,700
But to really impress,
flagging alone is not enough.

461
00:43:38,700 --> 00:43:41,266
He must show
what else he can do.

462
00:43:44,700 --> 00:43:48,933
As emotions soar,
it's now a competition.

463
00:43:48,933 --> 00:44:02,300
♪♪

464
00:44:02,300 --> 00:44:05,466
There's one
yet to take its turn.

465
00:44:05,466 --> 00:44:10,833
♪♪

466
00:44:10,833 --> 00:44:13,933
Hardly a serious contender!

467
00:44:17,100 --> 00:44:20,400
She's after the one
that leaps the highest.

468
00:44:20,400 --> 00:44:45,633
♪♪

469
00:44:45,633 --> 00:44:49,333
She approaches
the two best contestants.

470
00:44:53,300 --> 00:44:57,566
Our spy is cast aside.

471
00:44:57,566 --> 00:45:01,666
There can only be one winner.

472
00:45:01,666 --> 00:45:05,766
To decide, they must fight
it out among themselves.

473
00:45:05,766 --> 00:45:21,300
♪♪

474
00:45:21,300 --> 00:45:23,366
The female awaits the result.

475
00:45:23,366 --> 00:45:30,600
♪♪

476
00:45:30,600 --> 00:45:34,433
Finally, the loser
is driven away.

477
00:45:37,566 --> 00:45:40,200
She has her champion.

478
00:45:42,333 --> 00:45:45,066
He leads her back
to his burrow.

479
00:45:45,066 --> 00:45:52,066
♪♪

480
00:45:52,066 --> 00:45:54,133
They'll spend
the season together

481
00:45:54,133 --> 00:45:56,066
in his underground mud nest.

482
00:45:58,700 --> 00:46:01,166
Our spy's flagging performance

483
00:46:01,166 --> 00:46:04,533
was no match
for the high-flying males.

484
00:46:04,533 --> 00:46:13,833
♪♪

485
00:46:13,833 --> 00:46:15,333
Back in New Zealand,

486
00:46:15,333 --> 00:46:20,400
there's still one lost baby
far from his mother.

487
00:46:20,400 --> 00:46:25,266
Spy Albatross is tracking the
path of the lonesome seal pup.

488
00:46:27,300 --> 00:46:31,466
It follows the mountain stream
the pup was left climbing.

489
00:46:39,433 --> 00:46:44,266
His destination is a waterfall
high in the hills.

490
00:46:48,366 --> 00:46:51,900
But the pup is still
trying to reach it.

491
00:46:53,933 --> 00:46:56,766
He tries to press on...

492
00:46:56,766 --> 00:46:57,766
[ Grunts ]

493
00:46:57,766 --> 00:46:59,566
...but it doesn't
get any easier.

494
00:46:59,566 --> 00:47:05,033
♪♪

495
00:47:05,033 --> 00:47:08,766
And the journey so far
has taken its toll.

496
00:47:12,233 --> 00:47:15,866
He's dispirited and exhausted.

497
00:47:18,833 --> 00:47:20,166
[ Cries ]

498
00:47:20,166 --> 00:47:23,166
But once more he's not alone.

499
00:47:23,166 --> 00:47:29,400
♪♪

500
00:47:29,400 --> 00:47:31,766
[ Spy chitters ]

501
00:47:31,766 --> 00:47:41,333
♪♪

502
00:47:41,333 --> 00:47:44,866
Spy Pup invites him to play...

503
00:47:44,866 --> 00:47:49,566
♪♪

504
00:47:49,566 --> 00:47:52,866
...and has
the perfect plaything.

505
00:47:52,866 --> 00:47:55,833
[ Spy and seal calling ]

506
00:47:55,833 --> 00:48:00,266
♪♪

507
00:48:00,266 --> 00:48:03,166
How better
to raise his spirits?

508
00:48:06,633 --> 00:48:12,233
Play releases endorphins,
just as it does with dolphins.

509
00:48:12,233 --> 00:48:13,900
[ Calling continues ]

510
00:48:13,900 --> 00:48:29,900
♪♪

511
00:48:29,900 --> 00:48:32,300
It's just the boost he needs.

512
00:48:32,300 --> 00:48:39,466
♪♪

513
00:48:41,633 --> 00:48:44,966
But he still has one last hurdle
to climb.

514
00:48:46,566 --> 00:48:49,433
[ Barking ]

515
00:48:49,433 --> 00:48:51,466
[ Seals barking in distance ]

516
00:48:53,666 --> 00:48:58,466
Then, finally,
what all the climbing was for.

517
00:48:58,466 --> 00:49:06,666
♪♪

518
00:49:06,666 --> 00:49:12,300
A lagoon filled with the pups
that went before.

519
00:49:12,300 --> 00:49:15,833
His quest is finally over.

520
00:49:17,800 --> 00:49:21,100
All he needs to do
is take the plunge.

521
00:49:23,166 --> 00:49:27,200
Reunited with the pups
he last saw in the ocean.

522
00:49:30,266 --> 00:49:33,933
Here he can play
without a care in the world.

523
00:49:36,100 --> 00:49:39,033
But has he forgotten someone?

524
00:49:39,033 --> 00:49:42,733
His companion and playmate.

525
00:49:42,733 --> 00:49:48,600
♪♪

526
00:49:48,600 --> 00:49:50,900
With a new toy to play with.

527
00:49:55,066 --> 00:49:58,266
One to be shared
with everyone.

528
00:49:58,266 --> 00:50:03,900
But there's still one
who's missing out --

529
00:50:03,900 --> 00:50:06,866
a spy that's now a friend.

530
00:50:10,666 --> 00:50:14,500
With some encouragement,
it too takes the plunge.

531
00:50:20,066 --> 00:50:22,500
With a full team,
the games begin again.

532
00:50:25,333 --> 00:50:28,666
Passing the stick is a lesson
in working together.

533
00:50:28,666 --> 00:50:36,100
♪♪

534
00:50:36,100 --> 00:50:39,533
Vital when hunting fish shoals
as a team.

535
00:50:39,533 --> 00:50:58,433
♪♪

536
00:50:58,433 --> 00:51:02,533
It also builds strength
for life in the ocean.

537
00:51:02,533 --> 00:51:27,333
♪♪

538
00:51:27,333 --> 00:51:31,433
The pup will enjoy this mountain
paradise for a week or so

539
00:51:31,433 --> 00:51:33,633
before returning to the sea.

540
00:51:36,866 --> 00:51:40,466
He's had an emotional journey
to get here,

541
00:51:40,466 --> 00:51:43,566
but he's now better equipped
for adult life.

542
00:51:43,566 --> 00:51:45,600
[ Seals barking ]

543
00:51:45,600 --> 00:51:50,600
♪♪

544
00:51:50,600 --> 00:51:53,133
By befriending our spy,

545
00:51:53,133 --> 00:51:56,900
the pup gave us insights
into his inner feelings.

546
00:51:59,466 --> 00:52:02,166
Whoever he meets
in the future,

547
00:52:02,166 --> 00:52:06,100
he'll never make a friend
quite like his first one.

548
00:52:09,066 --> 00:52:11,700
Next time,
our spies will discover

549
00:52:11,700 --> 00:52:15,466
the extraordinary relationships
found throughout the oceans...

550
00:52:18,400 --> 00:52:23,433
...and how working together
is always the better way.

551
00:52:25,833 --> 00:52:27,600
[ Dolphins squeaking ]

552
00:52:27,600 --> 00:52:32,766
♪♪

553
00:52:32,766 --> 00:52:35,033
[ Whales singing ]

554
00:52:35,033 --> 00:52:45,000
♪♪

555
00:52:45,000 --> 00:52:46,200
[ Seals barking ]

556
00:52:46,200 --> 00:52:54,700
♪♪

557
00:52:54,700 --> 00:52:56,966
[ Mudskipper croaks ]

558
00:52:56,966 --> 00:53:06,866
♪♪

559
00:53:06,866 --> 00:53:08,766
To learn more
about what you've seen

560
00:53:08,766 --> 00:53:10,433
on this "Nature" program,

561
00:53:10,433 --> 00:53:12,500
visit pbs.org.

562
00:53:12,500 --> 00:53:15,900
♪♪