"Between 1979 and 1982, 16 homeless boys went missing from the West End area." "I want this to be my last case." "Why?" "Because it's meant to be." "I'm going to find out what happened to those boys." "There's blood, hair." "People died down here." "We think the killer is the same man who tried to abduct Darren Hawes." "The creep tried to get me in his car." "If I let a killer walk free at the ripe old age of 22, believe me, I will stand up and be counted." "What's the connection between the murder of an ex-cop in '69 and the serial killing of boys in the '80s?" "They're looking at the Stanley Heath murder, connecting it to those dead boys in Essex." "Boyd!" "Boyd, no!" "As you were." "This programme contains some violent scenes and scenes which some viewers may find disturbing." "Are you OK, there?" "Thanks." "REPORTERS SHOUT QUESTIONS" "Hi." "Are you OK?" "Yeah, I'm going to get a couple of hours' kip." "Right." "Are there any more bodies?" "There are more bones." "Whether or not that means more bodies..." "TBC." "Right." "Sir?" "Are you all right?" "I let the man go so he could build this." "Well, actually, I think he'd built it already." "I had a chance to stop him, is my point." "Like you said, we don't know if it was the killer." "We know." "Dennis told me you lost your son to the same streets." "Yes." "Is that why you want this to be your last case?" "We've made an arrest." "Jason Heath, 56." "We're going to interview him later today." "It would be good to know if he was the man who tried to grab Darren Hawes." "What happened, Sir?" "What's my dad got to do with these murdered boys?" "Just answer the question." "What if I don't?" "Are you going to hit me again?" "What was his brand?" "It says in your file you were out buying your dad cigarettes." "My old man" " Capstan Full Strength." "Gold Leaf." "Mild." "Like the man." "So what else does it say in there?" "That I killed my dad, but you couldn't prove it?" "Is it true your father was beating your mother?" "When he was drunk." "How often was that?" "My dad wasn't cut out to be a copper, drinking was his way to cope with the job." "But then you take the job away and what have you got left?" "All the bodies recovered from the M11 house were shot with the same gun that was used to kill your father." "Can you shed any light on that connection?" "The early retirement, the drinking, hiding in the greenhouse..." "It sounds like your dad was running away from something." "Did he talk about an enemy, someone who might come after him?" "Do you think if I knew something, I'd have kept it to myself?" "Maybe you thought they might come after you and your mum." "No, that wouldn't have stopped me." "I've been waiting my whole life to get justice for my dad." "Do you think it could be him?" "Right build, right age... and I detect copper roots under the black dye." "Factor in his criminal record, his sexuality, his connection with the gun... seems like a good suspect." "We're going to need more than that." "The gun cuts both ways." "How does a 15-year-old get hold of a Walther?" "Perhaps it belonged to his dad." "Like you say, feels like Heath was hiding from something and plenty of ex-cops keep a gun for a rainy day." "What we need is evidence of the imprint of a sexual sadist." "If he is Holmes, then I would expect to find hardcore bondage and asphyxia-themed pornography on his computer." "AND subscriptions to websites simulating homosexual rape." "And if we don't find such delights?" "Then he's not our killer." "She's rarely wrong." "Press conference." "Has Sarah called back yet?" "I've left a message on her landline - mobile's dead." "OK." "Peter?" "Play nice." "Nobody says "No comment" any more." "'What have you got from Heath's house?" "'" "A bit of gay porn." "Nothing scary." "Plus, he was teaching overseas when one of the kids went missing." "There is no smoke without fire - guilt by implication." "If the crime is bad enough, we can convict without going near a courtroom." "We just leak a few damning details." "Ballistics match, underage sex, inadmissible confession to a cellmate." "What cellmate?" "What confession?" "What...?" "Or, alternatively, you tell me who your father was hiding from in the greenhouse because whoever shot him killed those boys or knows who did." "I don't know who killed my father." "That was my deal, God dammit!" "Now I'm going to hand you over, I'm going to give you to them!" "To the tabloids." "They will crucify you." "They'll hang a sign over your head saying, "Child killer, right here", and YOU will burn in your bed!" "There was this time my mother was out and I heard this noise I hadn't heard before..." "My father crying." "SOBBING" "Dad." "What is it?" "What's the matter?" "Tell me." "I killed a man, son." "I killed a man." "RADIO:" "'To say goodbye to the '50s, 'and taking us up to midnight and the new decade, it's Elvis.'" "♪ Silent night" "♪ Holy night... ♪" "Give us a pull, Heathy." "Medicinal - dull the pain." "It's wild out there tonight." "Craddock." "Hang about." "Happy New Year, Heathy." "Yeah." "Piss off." "Hop it." "PRISONER:" "All coppers are queer!" "All coppers are fat, ugly, queer bastards!" "You queer bastards!" "Are you going to have that, Heathy?" "I'll sort him out." "WE'LL sort him out." "Open up." "♪ Ten queer coppers hanging on the wall!" "♪ There were three queer coppers" "♪ Hanging on the wall... ♪" "♪ Christ the saviour is born" "♪ Christ the saviour is born. ♪" "He said it was the other two who really wanted to mess the guy up." "What was the name of the prisoner?" "Jenkins..." "Anthony Jenkins." "When my mum died I was looking for her will and I found a copy of the inquest report into Jenkins' death." "He named the other two coppers involved - PC Craddock and PC Edgerton." "You decided to track them down to see if your father was telling the truth?" "You were praying it was the whisky talking?" "Within two years of my father's death, they'd both been murdered in the line of duty." "I was terrified." "I didn't know what to do, I didn't know what it meant." "I couldn't go to the police." "Because it would have meant telling the world your father was a murderer?" "I've lived my whole life in fear... that's never going to change." "Sorry I hit you." "Screw you!" "PC Craddock was fatally stabbed on Brighton seafront in 1971." "Six months later, PC Edgerton was mowed down in the street." "Neither crime was solved." "Like the Heath murder." "What about the guy they bludgeoned to death?" "Anthony Jenkins had a string of convictions, but small-time stuff." "So what was he in for that night?" "Domestic dispute with his pregnant girlfriend, a known prostitute called Cathy Nicholson." "Come on, let him out." "I never wanted you to nick him," "I just wanted him to calm down." "To calm down and sober up." "It's New Year's Eve, for Christ's sake, come on." "Oh, all right, all right." "Look at that - up the duff and still on the game." "What chance does the kid have?" "That doesn't mean the baby grew up to be Assistant Chief Commissioner Tony Nicholson." "It makes sense." "He's around 50, shares the same first name, grew up in the West End." "Nicholson's been all over this case since day one and he didn't ask Sarah for feedback... until after we made the connection with the Heath shooting." "What are we saying?" "The killing of Nicholson's father led to the murders of the three officers responsible?" "No!" "No!" "Get off me!" "Get off me!" "PHONE RINGS Excuse me." "Boyd." "Yes..." "OK." "Thank you." "Sarah - that's her shrink." "She didn't make the session this morning." "No, no." "She can't do that." "Not if she wants a future in the force." "Do you think Sarah was putting on a brave face for us?" "Her car's not in its parking space outside." "Get Eve to trace Sarah's mobile." "Last calls, location, if possible." "OK." "You don't think she's gone and done something stupid, do you, Grace?" "She was certainly feeling guilty." "But I don't think it was stupidity." "I think it would be something reckless to earn your forgiveness." "I'm trying to tell you I'm sorry!" "MOVE!" "Oh, God..." "This is Detective Superintendent Boyd." "I'm investigating the disappearance of DSI Sarah Cavendish." "She's been missing twelve hours and her mobile is switched off." "I want to raise an Attention Drawn for her." "Eve." "The last person that Sarah called was a Sergeant Greg Potts, an old colleague at Counter Terrorism." "This is what she asked for - the standard surveillance kit." "Did Sarah say why she wanted this stuff or who she was tracking?" "No, sorry." "Surely there must be some kind of protocol?" "Yeah." "I circumvented it." "I owed her - the way she was drummed out of Counter Terrorism, it wasn't right." "These lumps..." "If she activated one of them, could it give us a location?" "Yeah, but she's got the base unit." "Is there some sort of override software that lets us locate it with another base unit?" "Yeah, if you have the serial numbers." "Give me half an hour." "I'll speak to our tech guy." "Is she ok?" "Here you are." "Thank you." "Nicholson had a fresh cut on his face this morning." "Let's not get carried away." "We've got a visitor." "Didn't Sarah Cavendish recently suffer some post-traumatic stress?" "Yes, Sir." "Could this explain her absence?" "She's probably curled up with a bottle of whisky somewhere - or gin." "I hear that's her poison." "With respect, Sir, that sounds like wishful thinking." "I've pressed pause on the CID investigation that was generated when you called it in." "Why?" "I need you focused on the M11 case." "But if Sarah's in trouble, self-inflicted or otherwise..." "Peter, no-one's advocating complacency about a missing officer." "This is precisely why I've brought in DI Grigson and DI Khan." "They'll find Sarah, no fuss." "They just need access to her computer, her phone records..." "PHONE RINGS and all the cases she's worked on since she joined." "Please, sit down." "Please, take it." "Boyd..." "One of Sarah's tracking devices was activated this morning in East London." "'I'll text you the grid reference.'" "OK." "Thank you." "Crime scene?" "Central lab." "We should talk later..." "Good news?" "A possible DNA flag on one of the bodies." "Well, off you go, then." "Sir." "Excuse me." "Spence!" "Tail them." "Sir?" "Aren't we looking for DSI Cavendish?" "Cavendish is the reason Boyd is walking the plank... she dobbed him in." "In my day, we called it motive." "Right, it's coming up on the left." "OK." "Look, any car dumped at the gate gets crushed." "Relax." "You're not accountable for every dodgy car that winds up here, yeah?" "OK, all right." "TRACKER BEEPS" "TRACKER BEEPS FASTER" "There'd be blood, right?" "I mean, it would be everywhere." "Yeah, it would." "It would." "Tell him we'll be impounding this for forensic tests, will you?" "How can one human being do that to another human being?" "After all you've seen... you shouldn't still be asking that question." "No." "But surely the fact that you are is proof of your humanity, it means you care." "Are you able to tell us who these poor souls were?" "I'm building a biological profile of each one... sex, stature, age at death." "What's this?" "It's a mandibulometer." "It measures the height, width, angle of the mandible." "Was there anything else?" "No, no, nothing specific." "No, I'll get out of your way." "Oh, is there anything back from Central Lab on the DNA front?" "No, not yet." "PHONE RINGS" "Boyd?" "Eve, I want you to send a flatbed to pick up the remnants of Sarah's car and then deliver it to the Kent Police Garages." "I don't want to risk the Met, right?" "Why not?" "Remnants?" "What..." "What do you mean, remnants?" "I haven't got time now but it's possible that Sarah's been murdered and there could be evidence in the remnants of her car." "'I'll text you an address, OK?" "'" "Let's go." "PHONE RINGS" "Where are they?" "At a scrap yard in Barking." "Did Boyd just finish a call, by any chance?" "Yeah, he did." "How did you know?" "We're being tailed." "Yeah, we are." "We are." "So, where are we going?" "Cos they're coming too." "My place." "Your place?" "I've been meaning to invite you for years." "Find it OK?" "Yeah." "Hi, Spence." "Sarah?" "I don't know." "You need to see this, Sir." "It would be good to know what they were discussing." "Spencer Jordan's not going to help, he and Boyd are tight as two coats of paint." "Look here." "Dr Lockhart was close enough to supply a soundtrack to these images." "PHONE RINGS" "Hello?" "This is DI Meenah Khan." "When are you going to be back in your lab?" "I need to talk to you." "It's going to have wait until tomorrow." "No, that's not good enough..." "The most extraordinary things about Nicholson, apart from his success, are that his father died in custody, and he caught the M11 killer red-handed and let him go." "I think these two things are linked and the connection is what Sarah... stumbled into." "Nicholson's protecting the killer?" "Then AND now." "Why?" "I don't know why." "But that's why he was so keen to charge Jason Heath." "Two sides of the same coin..." "It's how that coin flips and lands that defines who Anthony Nicholson is." "I'm not talking about his name, or his rank, or his DNA." "I'm talking about his heart and soul, right?" "His guts, Grace, yes?" "The way his dad died, you'd expect Nicholson to grow up hating authority in general, and the police in particular." "But this is a man who joined the ranks of the police force." "He's taking revenge from within?" "He's not." "How's he doing that?" "He's an asset to the police force." "He's got an arrest sheet a mile long!" "You mentioned the two most extraordinary things about Nicholson, beyond his success." "Yes." "But his success is the most extraordinary thing about him." "That a child with such a violent and tumultuous start in life should grow up to do so well." "Right, so the fact that he's in the police force is eye-catching and interesting, but you're saying it's secondary?" "Yes, a social worker or a foster parent..." "Someone steadied the ship for young Nicholson and we need to meet that person." "So we need to check Nicholson's files." "Already tried." "Because of his rank, we need privileged clearance." "What about that girl you know in Personnel?" "June?" "Don't call her or anything, just surprise her." "No." "Just say, "Hey, I'm in the building." No." "Forget it." "Even though this is after hours, something tells me it isn't a social call?" "I'm working on the M11 murders." "God." "I need to look into the background of a DC who's working under me." "Can I ask why?" "I think he's leaking to the media." "Be good to know if he's done it before." "OK, give me his name." "I'll see what I can do." "Um..." "It's all a bit speculative, so maybe it's cleaner if you log me in and I just take a peek?" "What?" "You don't trust me?" "No, it's just..." "If the guy's done nothing wrong, I'd... feel bad." "You don't print anything, you don't use anything you find directly, and you buy me dinner before the end of the month?" "Deal." "Milk, no sugar, right?" "Mm-hmm." "Eve Lockhart, or at least her mobile phone, is in Kent police garage." "Right. 'I don't get it, Sir.'" "She's in the middle of a case, she's got 15 bodies to process, so what's she doing in a police garage?" "Good question." "Should I have her picked up, Sir?" "No, no." "Let's keep our powder dry... until we know what she's up to." "I've got to be quick, so it's highlights." "Nicholson was born in Westminster hospital and schooled in the Soho, West End area until age nine, when he went to a prestigious private boarding school in Tunbridge Wells." "He got four As at A-level but passed up uni in favour of joining the police where he flew through the ranks." "So who funded a decade's worth of school fees?" "It seems Grace's theory that someone steadied the ship is looking sound." "Marital history?" "In '87, he married Police Constable Debbie Sandler but, one year on, she filed for divorce." "Snoring, or something else?" "Be interesting to talk to Debbie." "Well, you get me a copy of that file, Spence, and we can." "Whoa, whoa." "No way." "I'm not even supposed to be looking at it." "Spencer, if this was a fair fight, we'd play fair." "But it's not and we can't, so get me the file!" "Oh, don't look at me like that." "You think I don't appreciate him?" "Dad!" "Tea?" "Sorry." "I've got to split." "The case..." "Hey, we've got a deal, remember?" "We're from the Metropolitan Police evaluation committee." "Sorry..." "Tony and I broke up 20 years ago, you're wasting your time." "Do you think we could just pop inside for a chat?" "Tony's a good bloke." "Very bright, very capable." "It's sad it didn't work out between us but I'm sure he'll make a great commissioner." "And that's to your credit, Debbie." "Are we done, then?" "You can't think of any reason why he'd specifically ask us NOT to speak to you, can you?" "He was always very secretive." "Every weekend he'd disappear for hours and never say where he'd been." "You never found out where he went?" "I gave him an ultimatum." "Disclosure or else?" "He called my bluff." "Said a marriage couldn't work without trust." "So he was the one who ended the relationship?" "I still don't understand it." "So we know that Tony had a rough start in life - father died before he was born, mother worked as a prostitute in Soho..." "He always said that was the making of him, never wanted any sympathy on that score." "What was his relationship like with his mother?" "He was devoted to her." "He never seemed ashamed of, you know, what she'd been." "He said she was... very beautiful, but completely hopeless." "And far too trusting." "When he was seven, he was taking money off the punters, and telling them how long they'd have with her." "Only had the one room, so Tony... made himself a little den in the corner." ""This was the beginning of a new era." ""Existing machines, such as those for spinning cotton" ""were steam-driven, and many new inventions..."" "Two years later he was at a boarding school in Kent." "That's right." "Did you have any idea who was paying the fees for that school?" "One of Cathy's punters was their landlord." "John... something." "Over the years, he got to know 'em, developed a soft spot for Tony." "They used to play chess together." "What happened to this philanthropic landlord?" "I don't know." "Long-dead by now." "But you're absolutely certain that he was the one who was paying the fees?" "Yeah." "After Tony's mother died, he spent summer holidays with him." "A real fairy godfather?" "Yeah." "The only fly in the ointment was John's son, who was a bit older." "Used to give him some stick." "I'm sure Tony handled himself." "He always has." "Martin, Tony." "Tony, Martin." "You're going to be seeing a lot more of each other." "Hello." "Don't worry." "He don't say much." "Eve?" "I found a bloodstain on a section of the carpet in the passenger footwell." "Nicholson had a cut on his face..." "Yeah, he did." "Are you taking it to a private lab?" "No." "If I do that, there might be questions down the line." "I'm going to process it at the lab." "DOOR OPENS" "I thought you weren't in until tomorrow?" "It is tomorrow." "What was the subject of the conversation?" "You're lucky we don't do you right now for obstruction." "A police officer is missing." "This is no time for misplaced loyalty." "The idea that he'd harm her in any way is completely absurd." "Last chance." "What were they talking about?" "She'd come clean about..." "instigating his dismissal." "Quite a big revelation, then?" "How'd he take it?" "Answer the question, Dr Lockhart." "He was understandably angry." "DSI Boyd has been nothing but supportive of DSI Cavendish since her arrival here..." "Spare us, please." "It's embarrassing." "He's indoctrinated you, fooled you all he walks on water and the rules don't apply in your bunker." "Newsflash - he doesn't, and they do." "Boyd..." "See you inside." "I'm curious to know why you've lost interest in the M11 case, curious and disappointed." "Why don't you save us all a lot of trouble and tell me the killer's identity?" "Do you have any idea how mad you sound?" "Still, it goes with cold-calling my ex at nine o'clock at night, sending Spencer Jordan to illegally access my file, tasking Eve Lockhart to collect spurious blood evidence that, despite all our efforts, no longer exists." "Oh, you're good." "But I'm better." "When you went to that school in Kent, the first day that you put that uniform on, did you feel like you'd arrived, secured your rightful destiny?" "Or did that blazer just itch a little bit, the collar chafe and the new shoes pinch?" "Did it make you feel more than ever, really, truly, like the son of a whore?" "Do you feel any less of a fraud in that get-up?" "Or are you still getting off on it - the filth killed my dad, now I'm king of their poxy castle?" "I give you six months." "A year, tops." "You gave it all to the job, you silly prick." "It's etched in your face." "No family, no friends." "No outside interest." "But outside is precisely where you'll be in six weeks." "You're going to rot... faster than a corpse in a car boot." "Oh, well, the die is cast." "Ah, so you're resigned to it." "Don't tell me... a secret passion for DIY." "It's Monday morning, let's do some woodwork, let's build a bird table." "I can delay that dread day for you." "Perhaps buy you another couple of years." "Stay focused on the M11 murders." "Take another look at Jason Heath." "He's gay, he's got form and you can link him to the murder weapon." "He was out of the country for at least one of the abductions." "Sexual sadists often work in pairs" " Paul and Karla Bernardo, Myra Hindley and Ian Brady." "Perhaps Heath had a partner in crime." "Five more years." "Even I can't swing that." "Oh, my mistake, cos I heard you were odds-on to become the next commissioner." "All right." "All right." "Five years." "And, since you ask, the posh blazer fitted fine." "I walked in there like I owned the place." "While they were interviewing me I thought I heard someone." "It's my fault." "I should've locked up." "It wasn't your fault." "No, but what if he gets away with it, and they try to pin it on you?" "They won't." "Trust me, Khan and Grigson are gunning for you." "Boyd!" "Nicholson's ex got two things wrong." "The guy that paid the school fees is not dead, he's alive and well and his name is George, not John." "She didn't get it wrong..." "Nicholson lied to her." "George Barlow." "He still owns the property 40 years on." "He's an old Soho face." "A slum landlord who went legit." "His portfolio stretches from Florida to Zimbabwe, to half of East London." "So, he's got a record?" "Well, if you go back to the '60s." "He's beat off charges of extortion, fraud, money laundering, intimidation..." "Boy, you name it." "A real villain." "OK, so what are the two most burning questions about Nicholson's past?" "Who paid his school fees?" "Who took out his dad's killers?" "It's two questions, one answer." "George Barlow." "A man like that doesn't give unconditionally." "There's always a string attached, a return down the line." "Exactly." "If he avenged Nicholson's father, maybe he made the boy witness it, or even be a party to it." "Think what he did to your dad." "Took him away before you'd even had a kiss or a cuddle, a bump on his knee." "GUNSHOT" "GUNSHOT" "GUNSHOT" "HE WHIMPERS" "GUNSHOT" "The urine at the Heath shooting." "Yeah, and all the shots except the last one were off target." "There were two killers." "Yeah, freed from one demon and bound to another." "Jason's lucky he didn't come home earlier." "So, Barlow groomed Nicholson." "He needed a son and heir, recognised the boy's potential, you can't say he didn't fulfil it." "How much says Nicholson's had a hand in keeping Barlow out of jail all these years?" "But if he had a son of his own, why'd he need a replacement?" "That's a very good question." "Flesh and blood means everything to these East End guys, so... what was wrong with the original model?" "Martin Barlow, aged 19, was charged with sexually assaulting a schoolboy in '76 but the case was thrown out." ""Victim withdrew his statement." Day before the committal." "Can we connect him to the car, the gold Capri?" "I've got a list of matching vehicles from '79 to '82." "I'll check it out." "That's why Nicholson let him go free." "He recognised him." "It was George's son." "The gun never left the Barlow family." "Martin Robert Kevin Barlow, born 15th of May, '56." "Sold a Capri, January '83." "What's his address now?" "There's no update on his licence since '83." "So he's not in prison." "So that leaves moved away or dead." "I'm praying for the latter." "He's both." ""English farmer Martin Barlow, 44, was found murdered on his farm in Zimbabwe on June 14th '99."" "George Barlow had property there." "He'd been the right age." "Farmhands were accused but no arrests were made." "If Martin left the UK in the '80s, that means he was out there for over a decade." "Psychopaths don't stop." "Chaos of a Third World country is the ideal killing ground for a predatory psychopath." "MAN SCREAMS" "KNIVES SHARPENING" "I sound like an old fart, but the West End's gone to hell since my day." "So many runaways, most of them Northerners, on the whizz, on the glue, on the smack." "I tell you, you could drown them like rats on a daily basis." "No-one would be any the wiser." "Dish up, Martin." "We're starving to death out here." "Everything's in hand." "Boyd is not going to be a problem." "Those farmhands, they did us a favour." "It's for the best he never came back from Zimbabwe." "I mean, for Christ's sake, he killed those kids." "He did terrible things to them and shot them with your gun!" "If there'd been some long drawn-out trial, then..." "Then what?" "You still don't get it, Tony." "He was a wound in my side." "A source of daily disappointment." "He was a bloody freak and a monster." "But he was my monster." "My flesh and blood." "My... son." "Dad, I'm sorry." "Dad, Dad..." "And if everything's in hand, why does this Boyd want to see me?" "When did your son move to Zimbabwe?" "1982." "When in 1982?" "Christmas time." "That's an odd time to move." "Did anything precipitate him leaving?" "No." "He wasn't in any kind of trouble?" "Martin?" "He was a good lad." "Never gave me any trouble." "Apart from that sexual assault charge when he was 19." "Pack of lies." "Charges were dropped." "What kind of work did he do before he went to Zimbabwe?" "Nothing much." "Couldn't settle at anything." "Where was he living then?" "At home with me." "His mum died giving birth to him so I was his whole family." "So any disposable income he had at that time came from you?" "Yeah." "So if, say, he'd bought a disused pub, in cash, you would've known about it?" "I don't know anything about a pub." "Oh, so Martin, aged 26, suddenly decides he wants to be a farmer... in Africa." "I'd bought a place out there." "Someone had to run it." "In December 1982, Martin was caught red-handed trying to grab a boy off the street." "This boy, Darren Hawes." "'Creep tried to get me in his car.'" "And now, as luck would have it, one of the policemen who responded was in your pocket." "Still is." "What are you on about?" "I'm a businessman." "I'm not Al Capone." "What I'm on about is that Martin had to disappear, didn't he?" "He was going to undo a two-decade crawl out of the gutter." "Foundations, donations, swimming pools, gala dinners with the local MP's wife's sister." "That was all going to go for nothing, wasn't it?" "You had to lose the freak, even if he was your son." "Martin... wasn't a people-person, I grant you." "But he had a heart of gold and he was murdered, so I'll thank you to show some respect." "And why do you think he was murdered?" "Look, the African police screwed up, so I don't know who killed my son." "But you know why." "In your heart." "In your heart you're surprised nobody killed him sooner." "He inflicted unimaginable deaths on children across two continents and you did nothing!" "And the blood of every one of those children is on your hands because you knew what he was and you still did nothing!" "Just like Assistant Chief Commissioner Anthony Nicholson." "Tony was just a kid I helped on his way." "Your big lunge for respectability was winning the East Docklands redevelopment contract in '91." "But you didn't win it first time." "That was AMF Construction, but then their MD was caught with a kilo of coke and a safe full of drug money." "And who was the arresting officer?" "Wouldn't happen to be Detective Inspector Tony Nicholson?" "No, that would've been too much of a coincidence, ten years after he saved your son from a padded cell in Broadmoor!" "What?" "!" "A minute." "He took too many to stay invisible." "The Bulawayo police were so sure they had a serial killer on their hands they called the FBI." "My son is dead." "He can't defend himself." "But you taint him with this shit and I'll have your job." "Sorry, someone beat you to it, George." "What else you got?" "Sir?" "We need to speak to you, Detective Superintendent Boyd." "Excuse me, I'm in the middle of an interview." "Peter Boyd, we have a Section 8 PACE warrant to search your residence in connection with the disappearance of Detective Superintendent Sarah Cavendish." "Meenah!" "Meenah!" "You can't go in there, Sir." "Sir, you can't go in there!" "ECHOEY VOICE:" "You do not have to say anything, but it may harm your defence if you do not mention when questioned, something which you later rely on in court." "Anything you do say may be given in evidence." "I'll talk to Assistant Chief Commissioner Nicholson and only him, but first I want my phone call." "What?" "They've arrested Boyd." "PHONE RINGS" "Boyd." "Yeah." "Good afternoon, DI Jordan." "In light of Detective Superintendent Cavendish's murder, the Assistant Chief Commissioner asked me to check the house." "Let me call Tony." "Please, Mrs Nicholson." "He's in the middle of something and ordered me to do this." "Sorry, are you telling me I can't call my own husband?" "DIALLING TONE" "'You've reached the voicemail for Assistant Chief Commissioner Tony Nicholson...'" "All right, come in." "Sorry to disturb you." "Zimbabwe." "Gotcha." "How much destruction have you left in your wake?" "Mel Silver, Stella Goodman, your own son?" "And now Sarah Cavendish." "You were a good detective once, no question." "Just got away with too much for too long, skewed your moral compass, calcified your conscience." "Thought you'd be lost without your precious Cold Case Unit, but you lost your way years ago." "We know you're sorry, Peter." "That's why you covered her up." "Undoing," "I think that's what Dr Foley would call it." "Clinical evidence of remorse and regret." "Max, Troy, Hopper..." "You neglecting to bury or conceal the body was your way of saying..." "Howie, Mickey, Eric..." ""I don't want to get away with this." "I want to be caught." Jesse, Chris, Kenny..." "Jamie, Johnny, Matthew, Kurt..." "Carl..." "HE SOBS" "Billy..." "HE SNIFFS and Pele." "50-plus children in Zimbabwe whose names I do not know and one other, one you took care of," "Darren Hawes." "You saved him on Monday so you could kill him on Friday." "This isn't doing any good." "Undoing, undoing." "A week after the FBI were called in and the killings made the UK headlines, Martin was dead." "You flew out to Zimbabwe to do what you should've done 17 years ago, you put him out of action forever." "George already knows this." "Deep down he does." "He just needs a nudge." "Let's get back to Sarah Cavendish." "Check your messages." "What is this?" "IT'S A NUDGE!" "A nudge." "Clinical evidence of remorse and regret." "Date stamp on your last passport, proof you were in Zimbabwe on 14th June, 1999, the day that Martin was killed." "He can't do that!" "You want to go in there and tell him?" "George gave you a new life and you repaid him by taking his son's." "We both know he's going to kill you, but not until you've watched your wife and baby die first." "Give us a minute." "Please, give us a minute." "What do you want?" "Liberty." "You personally transfer me to a different police station where I can stage a dramatic escape." "You'd be picked up within a day." "Maybe." "Maybe not." "You said it yourself, I'm not built for retirement." "You've let worse than me go." "Where's my passport?" "Spencer Jordan has it." "Right." "Call him." "Tell him to meet us at Hewson Storage, near Heathrow." "Relax." "It's just a storage place." "I was seven years old..." "I don't need or want to hear this." "I was seven years old and he was the answer to all my prayers." "My dad avenged, my mum off the game, both of us out of that pokey little garret." "I couldn't say no." "And when I realised what "yes" meant, it was too late." "Protecting Martin is just the tip of the iceberg, isn't it?" "I've paid my debt ten times over, put it that way." "Did she suffer?" "Sarah?" "It was quick." "George." "Dad..." "No, no, please!" "Not for me, for Anna, for the baby!" "Dad, please..." "GUNSHOT" "MOURNFUL MUSIC OBSCURES ALL SOUNDS" "Dad, no, please." "Not for me, for Anna, for the baby!" "Dad, please..." "GUNSHOT" "HE CRIES" "Are you sure he said here?" "Yeah." "You did all right, Spence." "All right?" "I might have a criminal record, thanks to you." "BOYD'S VOICE:" "'Did she suffer?" "Sarah?" "'" "NICHOLSON: 'It was quick.'" "Do you think it'll be enough to clear you?" "I hope so." "So what are you going to do?" "I've absolutely no idea." "Nine bloody years, and we end up homeless under Waterloo Bridge!" "I don't know, it feels kind of familiar, don't you think?" "Too much concrete, not enough light." "Subtitles by Red Bee Media Ltd" "E-mail subtitling@bbc.co.uk"