[ Theme music plays ]
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[ Dramatic music plays ]
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[ Police radio chatter ]
##
-Still here. -Mm-hm.
Takes a while.
They have to be so careful with the remains.
Twenty years in the water, what's left could disintegrate.
Do you believe me now?
I've been telling you for years where she is.
Could you accompany Dr. Beck home please?
I told you I was being followed. You did nothing about it.
How many times did your lot have him in for interview?
Go home, Charles.
We'll keep you informed of the pathologist's findings.
Are you going to wreck her life too?
I was trying to help you, and look what happened to me.
He said she was in the water
Beck knew Calvin Dunn's MO intimately.
What better way to get rid of your wife?
##
She's been there for twenty years?
Velvy, we need to be quick here.
We need to get moving before the remains
and the clothing disintegrate.
##
We need to move fast.
Now please.
##
This is Zoe Beck's dental records from 2002.
Why are the teeth pink?
Nikki: You see it sometimes in bodies
that have been in water for a long time.
It's thought to be from haemorrhage in the pulp chamber,
but nobody knows for sure.
Unusual spacing, amalgams on Upper Right 6 and 7.
So, it is her? Dr. Beck's wife?
Do you think he could have killed her?
Velvy, why don't you go and find Jack and see
if you can give him a hand.
Now?
I'll go now.
Thanks.
##
[ Door opens ]
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Excuse me?
##
I'm afraid you can't be in here
##
Did you hear me?
For God's sakes!
Charles.
##
You can't be here, Charles.
Yes. Of course, I-I just came to...
Sorry, automatic pilot, you know.
I-I-I think I wanted to talk to you...
I'm not allowed to talk to you about any of this,
Charles, you know that.
The police will notify you if we have a positive ID.
Of course. I remember. I remember.
You need to protect yourself.
Sorry?
This job, it wants to kill you.
##
What's he doing here? You know he can't be here.
I know that Gabriel, thank you.
Should I call the police?
He's upset.
We pulled his wife out of the reservoir this morning.
He wanted to see her.
Or corrupt the evidential trail?
##
[ Camera shutter clicking ]
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Uh-oh. Here he comes. What are you doing here?
Dr. Alexander suggested I see if you need any help.
I bet she did. Alright then.
Make yourself useful. Photos.
-Yeah? -Right the way down.
So this Charles Beck's boat.
The Zoe.
Jack: And her body was wrapped in its sail.
It's not a sail. It's a Spinnaker.
Big yachtsman, are you, Velvy?
I looked it up.
A spinnaker's an extra sail, like a sixth gear.
You kill your wife, you use your own sail to wrap her in,
then you spend the next twenty years telling the police
where to look for her.
Maybe he wasn't a very good murderer.
They can't all be --
What, pros? Like Calvin Dunn?
Is that where you'd store your spinnaker, Velvy?
-Mm-hm.
Agh! Man.
Are you OK?
It's an easy place to bang your head.
-Hey, grab us a swab there. -Mm-hm.
##
Quite sharp there.
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Maybe whoever took the spinnaker also hit their head here.
##
Are these meant to be the same?
They are if you know how to look at them.
The one on the left is Calvin Dunn's
DNA sample from 2004.
The other one is from the boat
that we took a sample from yesterday.
His DNA was on the mast near where the spinnaker was stowed.
We could put Dunn on the boat, wrapped her in the sail,
dumped her in the water.
So Charles Beck didn't kill his wife?
You seem disappointed.
Do I?
If Beck had killed Zoe, I wouldn't need to feel so guilty.
What?
I was the one who suggested putting Beck on TV
to talk about the murders.
So Dunn stalked and killed his wife.
So, it's your fault? That's ridiculous.
I kind of liked him.
Sorry?
Ford: Calvin Dunn.
I felt like I knew him, you know.
Beck was right.
I let Calvin Dunn keep on killing.
##
Are we going to be much longer?
I've got to pick up the kids, you see.
Ford: Lee and Mia, right?
They do dance on Wednesdays.
Ford: You and Mrs. Dunn have been together a long time.
Fourteen years.
It's difficult.
Ford: What do you mean, Calvin?
We got together at school, we were kids.
But now there are things I can't tell her...
Ford: What sort of things?
Sometimes I tell her stuff that I shouldn't.
Ford: You're only as sick as your secrets,
that's what you said.
Can you tell me?
[Singsong] Sorry, O. S. A.
Ford: You're talking about your work.
Official Secrets Act.
Nikki!
Close the door.
I've done some digging.
Calvin Dunn was working on a secret drone program
for the Pentagon.
He helped design software for the drone targeting system.
Dunn was spending his days writing software
to kill people from the sky.
"I am God," right? "I look down on all of you."
##
It's all online.
There was a huge dump of it on Wikileaks in 2010.
It's all there, even the software code.
Rumour online is that Calvin Dunn leaked it himself.
In 2010?
##
That's six years after everyone thought he was dead.
##
I don't call myself Mia anymore.
Not that it helps.
People find out soon enough.
I saw this American woman on TV,
her dad killed, like, ten people.
She asked for a brain test,
and they said her brain was completely normal.
But you could tell she didn't believe them.
##
I heard he broke into your house.
What did he want?
##
I don't know.
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He never wanted anything from me.
It's you he loved.
##
He should be coming for you.
His little soldier.
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I hope he does.
I dream of it.
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I shouldn't have come.
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We're no sort of family, the Dunns.
##
No one better die today, we'll have nowhere to do a PM.
Unless you want us to do it out in the car park.
Sorry. There was nowhere else big enough to do it.
I'll clean up, honest.
Dr. Alexander.
Nikki.
About yesterday... I'm sorry.
I-I shouldn't have been there. I've been very emotional.
Of course.
That's not what I wanted to talk about...
I wanted to tell you myself.
The woman from the reservoir,
the dental records and DNA are a match.
It's Zoe.
I'm so sorry.
##
Do you ever imagine how it would feel to hear it yourself?
-Charles... -I never did.
Not once.
What is that? A failure of imagination?
Or empathy?
##
When will she be released? When can I bury her?
You told me already?
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No, I didn't.
##
You know how it works, Charles, it's up to the Coroner.
Hopefully soon.
We found something else on your boat --
traces of DNA matching Calvin Dunn.
##
That's supposed to make me happy, is it?
No. Vindicated maybe?
Give me some kind of closure?
##
I'll make tea.
##
Are you getting any help, Charles?
Some trainee Family Liaison Officer? Please.
Nikki: That's not what I meant.
##
You were in our changing room.
You thought...
##
You must have seen it on the lab bench --
the senile neuritic plaques,
the neurofibrillary tangles.
I've seen it.
I'm fine at the moment. It's under control.
Nikki: Are you taking any medication?
You can't tell anyone about this.
You have to promise.
I'm not a danger to anyone, not even myself.
I'm not driving anymore.
I'm sorry.
##
Are you worried?
##
About the Alzheimer's?
##
There's a lot I wouldn't mind forgetting.
But I don't want to forget her. I let her down.
Nikki: No you didn't. You never stopped.
You never gave up.
Ford will find Calvin Dunn and bring him to justice.
On one side of the scale is Zoe.
Four other victims. The families.
On the other side there's him.
How can he ever pay that price?
##
-Velvy. -[ Gasps ]
Sorry, you jumped a mile.
-[ Sighs ] -Think you'd seen a ghost?
Worse than that. You sounded like my mum.
Scarier than any ghost.
I know I said I'd clear up.
It's just that there's this one last bit.
Carry on.
[ Laughs ] Oh, my mum loved the church.
Always polishing something -- the floor, the brass,
the vicar.
"God's eyes are always on you."
God and the Queen, always Looking down on you.
##
God... What's the hell's he doing?
Velvy, if Professor Mary Poppins sees this,
he'll do his nut --
-Have you been through this one, Velvy?
-What? -You're okay with this?
Velvy found DNA on a piece of clothesline
used to wrap the sail in.
After twenty years?
It was on the inside of the knot.
You know, where you'd ask someone to put their finger.
Calvin Dunn?
No. A second DNA source.
It's partial, but it's not Dunn's.
-Then who? -As yet unidentified.
We're sending it off to see if it can be enhanced.
-So, he had help at the boat? -Not just there.
These are historic samples sent over from the police.
We've found the same source at three
of the other Calvin Dunn scenes.
-He had an accomplice? -He still has.
The same source was found at St... Margaret's last week.
We're just starting on the Dominic Johnson crime scene now.
Dominic.
You were the only survivor of the Calvin Dunn attacks.
Nobody knows. Not my husband, not our kids.
I've built a new life for myself out here.
I've been going through your 2004 statement, Dominic.
You got into Dunn's car, he drove you to the Woods,
then he attacked you and then he stopped.
You said you thought he went back to the car
to find something to wrap you in,
and you managed to escape.
It was a miracle.
Do you recall anyone else being there?
What do you mean?
We've found evidence that someone else
might have been present when Dunn attacked you.
You're saying there was someone else there?
-We think that's possible. -Who? An accomplice?
Dunn had someone with him? I don't understand.
Someone else was there. I know this is difficult,
Dominic, but please try and remember.
I can't. Stop asking me.
I'm so sorry Dominic,
I can't stop asking you because you are --
I know why. But it's not my responsibility.
Dominic. You're the only one who --
You call me up and tell me that when I was nearly murdered,
there was another person there?
Watching? Helping?
Dominic...
Fuck you.
##
Are these the clothes from the man at St. Margaret's?
We're trying to find a better sample of the second source DNA.
We've got plane tree spores,
concrete dust, and tyre particles.
A couple of hairs here. Not human.
Maybe he had a cat or a dog?
If it's a rare breed,
we might be able to trace him through that?
We're in long shot territory here, aren't we?
It's twice as thick as human hair.
A big dog? Like a wolfhound?
It's got different cellular structure.
What are you looking for?
Hoffman's Book of Mammal Hair.
Thomas kept a copy. It's a classic.
Yeah. It's horse hair.
How many horses and stables can there be around Greater London?
Lots. Be tough to find this one.
Unless someone really loves it.
##
Smokey.
Or "Stick It in Your Pipe and Smoke It,"
to give her her racing name.
They registered her DNA in case she was stolen.
That's the English for you.
Love their animals more than people.
Can I help you?
I saw that picture on Twitter a few times.
It never occurred to me for a second it was Mason.
Mason?
Yeah, he didn't look like that in real life.
I never even saw his hair --
always wore a beanie, even for mucking out in summer.
He worked here? Mason?
That a surname?
Never asked.
It was pretty informal round here, you know.
Mason helped out, and we pretended not to notice.
Notice what?
-He lived here? -Yeah, and he came and went.
We wondered if he was living rough.
Mason hated the idea that anyone would think he was homeless.
He had problems. Pills.
When did you last see him?
Dunno. Last week maybe?
But like I said, he came and went.
-No family, no address? -No.
But I've got his phone number.
It's been disconnected.
##
Man: Ma'am...
We're checking all Mason's calls and texts.
His phone last pinged On a tower in Rickmansworth.
04:24 on the 21st, only a few hours before
he was found dead at the church.
-Eleven miles away. -Did he make any calls?
Ford: There's one here at 03:45.
Who was he calling?
He called 999.
Leo, get onto 999 dispatch.
Get me a record of this call.
On it.
##
Rickmansworth, St. Margaret's church.
How did Mason get from one to the other?
We know so little about him, not even a full name.
He liked horses.
The man at the stables says he thought he was Northern.
From the north east.
Boss!
Operator: Hello, Emergency Services Operator.
Which service do you require? -Man: Hello --
Operator: Do you require fire, police or ambulance?
Man: [Choking] Please. Please. Doctor. Need a doctor...
Operator: What's the nature of your emergency, sir?
Sir, can you tell me where you are?
Man: Need an ambulance. Please.
Operator: Sir, can you tell me your location?
I have you in the Rickmansworth area.
Are you at an address?
[ Man choking ]
Sir?
West 4 dispatch.
I have an emergency caller who's non-responsive.
I'm sending through the call location.
Woman: I have that. Thank you. We will attend.
-They sent an ambulance. -I need to find that crew.
Get me their call sign.
They didn't send an ambulance.
They sent a single responder, M.R.U. 0205.
Motorcycle Response Unit?
##
0205 is Lee Dunn's call sign.
##
What?
Velvy: Jack, that second source of DNA
we found at the Calvin Dunn killings.
I asked for a familial search.
The highest ranked match was to a male relative of Calvin Dunn.
It's Lee Dunn.
##
All the historic crime scenes contained second source DNA
that was not identifiable back then.
DNA at four of those sites
is now confirmed as belonging to Lee Dunn.
He was only eight years old.
What sort of an accomplice is that?
Velvy also found DNA matching Lee's profile
on the inside of a knot from the sail
that Zoe Beck's body was wrapped in.
Inside the knot? [ Scoffs ]
He was just a child.
He was also his alibi.
Lee was helping his father then.
Maybe he's helping him still.
He's not like other dads. He does stuff with me.
Makes stuff, tells me stuff.
Ford: What else do you do with him?
Camping.
Ford: And where do you do that?
We don't do it anymore. Not since Mia. She's too little.
Ford: On Tuesday night, you told me your dad was babysitting.
Yeah. We watched "The Goonies." It's a 12A, but he lets me.
What about when you were going to sleep?
Did you hear him go out?
Dad lets me stay up till half past ten, when Mum comes home.
We make dinner together, I help him with everything.
[ Sirens wailing ]
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Officer: Armed police!
[ Woman shouting indistinctly ]
##
What are you doing here? Come on, out, quick.
Armed Police!
[ Baby crying ]
##
-How did you get in there? -I know where he keeps his keys.
I got this text from him saying "I'm sorry," and I was worried.
He's not picking up his phone.
I know. We think he's with his Dad.
We think he's helping him.
What are you talking about? Lee hates his dad.
[ Cellphone vibrating ]
-Yeah. - Jack: Boss.
We've found a car at Colne Valley.
It was registered to Calvin Dunn.
##
Bring it in.
Check your radios.
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[ Dog barking ]
Let's do this.
[ Officers shouting, dog barking ]
##
The dogs picked up the scent of Calvin and Lee Dunn.
They were both here.
Jack: Calvin's been living rough all this time?
Lee always said his Dad had a place in Colne Woods,
he said he took him here once, camping.
Looks like they left in a hurry.
We might not be far behind.
[ Police radio chatter ]
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-[ Choking ] -Get medics! He's alive!
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[ Gasping ]
##
Find him.
Find him!
##
I want a ring of steel.
Calvin Dunn is in those woods.
No one gets in or out until we find him!
Yes, ma'am.
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[ Siren wailing ]
##
He did this to you.
Your father.
Where's he gone, Lee?
I don't know.
You should have left me to die.
Has he been living in the woods?
All this time? Where is he?
I begged for you to find him.
You begged us? You were helping him.
We know you answered that 999 call.
Did you kill Mason? Did you watch your dad do it?
I have to do what he tells me.
You've been at it a long time, Lee.
Calvin's little helper.
You don't understand...
I am the only one who understands.
He gets under your skin, doesn't he?
I listen to what he says, and I don't have a voice.
And I thought I could put it right by saving lives.
But he was watching, he was always watching all the time.
Looking down.
##
He said I was his little soldier.
##
-Where's Jack? -Colne Valley.
The police are searching the woods for Calvin Dunn.
Is that the box from Mia Dunn's house?
Yes, I'm cataloguing it now.
##
Professor: We found a note with Calvin Dunn's handwriting.
It was in the box from his daughter's house.
I think it's a car registration.
721MV49.
Hang on. I'm running it through the P.N.C. now.
No, it's nothing. Maybe it's a foreign reg...
If it's all right with you, I need to --
-It's not a car reg. -Goodbye, Professor.
-It's G.A.R.S! -I beg your pardon?
Global Area Reference System Like G.P.S.
It's what the Pentagon use.
What's the location? Can you get me the G.P.S equivalent?
It's Denham Marsh.
It's woodlands, there seems to be some sort of structure there.
I'm sending you the corresponding
G.P.S coordinates now.
Ford: OK. We're on it.
[ Dog barking ]
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[ Officers shouting ]
##
Jesus.
This must have been where he brought them.
Where is he?
##
Oh, Dr. Alexander.
The toxicology for Mr. Mason is back.
It felt strange, calling him
"man from St. Margaret's" now that we know His name.
You're right, Velvy, good idea.
There are traces of lamotrigine.
But it's sub-therapeutic levels.
Are the brain and laryngeal samples back from micro CT?
They've been de-calcified.
I'll get the slides now.
##
I think we've found where Calvin Dunn's been hiding out.
What do you think of this?
The tox report showed low levels of lamotrigine.
That's right. Sub-therapeutic.
Look there.
There's background sclerosis.
So Mason was epileptic?
Where is he now? Mason?
We moved him to storage.
##
A sustained epileptic fit could cause paralysis
of the respiratory muscles.
Sub-therapeutic levels of lamotrigine can cause S.E.
He was living a pretty sketchy life.
It's quite possible he wasn't taking
his anti-epileptics regularly.
So, death could have occurred in the course
of an extended epileptic fit?
What about the parchmentation?
Peri-mortem.
But it could have happened soon after death.
He died and then he was strangled?
Why?
Maybe because someone wanted us to believe
that he was killed by Calvin Dunn.
##
Ford: Your father didn't kill that man, did he, Lee?
You didn't kill Mason either.
Nobody did.
Mason died of an extended epileptic fit.
I tried to save him. I really did.
So he was already dead?
He was non responsive when I got there.
Worked on him for 20 minutes.
Ah. So that explains the bruising.
What it doesn't explain is why you then strangled him
and left him in the church.
I wanted you to think he was back.
Why, Lee?
To punish us for not finding him?
It was twenty years.
And you'd stopped looking.
Even y-- [ Sighs ]
I hid Mason's body, then I went back for my car
and my dad's old stuff.
##
Then I took the body to St... Margaret's.
Just like dad did.
##
So it was all you.
The call to your sister, the break-in at her house,
wearing his clothes, his aftershave.
The tent in the woods.
##
Calvin Dunn was never there.
But he's always there!
You know that.
He's never gone away.
I needed you to find him.
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There's something else you didn't tell me, isn't there, Lee?
##
No.
##
You were with him. Back then.
##
Every time?
Why didn't you tell me?
##
[Crying] I didn't want to believe it.
##
You just gonna stand there, buddy?
Or are you gonna help?
Pass me one of those.
##
I helped him.
He couldn't have done it without me.
And then Aysha told me she was pregnant...
How can a man like me be a father?
You never killed anyone.
You don't think I could?
You don't know anything, Jane. I think about that all the time.
Is it possible, Lee, that you think about it
all the time not because you're like him,
but because you're nothing like him?
You should have left me there.
You could have died.
Another minute, they said, and you'd have been dead.
Just so we could think that was him too?
No. I wanted to die.
I deserved to die. No, I tied it tight.
There has to be a price, doesn't there?
I should have to pay for what I did, too.
-Have you seen your father, Lee? -[ Scoffs ]
-The truth this time. -You know he's alive.
He released all that stuff about the drones.
He showed me videos when I was little, fire from the skies...
You haven't seen him.
I feel him.
I feel that he's alive.
##
Do you feel it, too?
##
I wonder where he is, Calvin Dunn.
Dead or far away.
I always thought what we do is the end.
But it isn't, is it?
It's just the beginning.
We see the rock go into the pond,
but we're not around to see the ripples spread out for years.
Forever.
##
[ Knock on door ]
##
Who are you?
Charles, I'm --
I'm messing with you.
Come in.
You always said it wasn't Calvin.
You get an instinct for these things, don't you?
After a while.
We were all fish once.
Then one fine Paleozoic day, we dragged ourselves onto land,
tetrapods became reptiles, birds, mammals, then humans.
We went from striving to survive to this --
finding new and better ways to destroy each other.
That's evolution, is it?
Then there's you.
Your garden, your work, your love for Zoe.
I think you're evolved.
You don't know me very well.
I'm as Paleozoic as the next man.
Where's Nikki? Is she still at Becks'?
We haven't seen her. What is it?
Call Ford.
##
I'd like you to come, you and Jack.
Thanks to you, I can say goodbye while I still remember.
We'd be honoured.
##
Is everything okay, Nikki?
##
What's wrong?
##
You were so sure Calvin Dunn was dead.
Becks: I still am.
Why? The attack on Dominic Johnson...
The one who got away?
How did he get away?
Calvin Dunn gave a voluntary DNA sample.
When it came back as a match to the victims,
you'd have known before anyone.
Even before the police.
##
Did you go after him, Charles?
##
Was it you who stopped the attack on Dominic Johnson?
##
That's how you know Calvin Dunn is dead, isn't it?
##
You killed him.
##
I think you should go now, Nikki.
Nikki: You said no amount of prison would give you justice.
So you took it for yourself.
Did it work?
Not yet.
##
Nikki: The police will come.
Your DNA was at the scene.
It doesn't matter anymore.
##
I'm ready for this to end.
##
[ Door opens ]
##
I'm ready for this to end.
##
Charles?
##
[ Rustling, she gasps ]
##
Oh, God.
##
[ Door opens ]
[ Hyperventilating ]
##
No.
##
Who are you?
##
Charles: It took three years for him to start talking.
After three more, he had nothing left to say.
##
He told me all about the drones.
I made sure the world found out.
He even told me where Zoe was.
I could never find her.
She was in the reservoir somewhere.
##
This is Calvin Dunn.
##
At first, I put him in there to find out where Zoe was.
But it was never about that.
I thought I could punish him forever.
I thought it might help.
##
It didn't.
##
I won't remember for much longer.
Maybe I won't even remember he's here.
##
Take him if you want.
Keys on the wall here.
##
It's just out there.
##
[ Door creaks ]
Charles!
##
Charles!
##
[ Shouting inaudibly ]
##
[ Police radio chatter ]
##
What are we meant to do? There's nothing left of him.
Where's Nikki?
Over there.
##
[ Theme music playing ]
##