"My boss." "Samuel Walker." "Unidentified government agents meeting in Switzerland." "Talk of a new world order." "Harry Pearce has come to me asking for help." "Some talk of a global conspiracy." "You don't suspect Lucas?" "I suspect everyone." "I have something for you." "A covert meeting in Basel, Switzerland." "Be careful who you trust." "I've asked Swiss immigration to send photographs of all passengers flying into Basel that week." "I should get the information tonight." "If you want me to leave..." "Stay." "I love you so much." "OK?" "I can't stop thinking about Sam's girls." "They're too young to lose a father." "Did they have any idea, about his illness?" "Walker was a fighter, wasn't he?" "Fought the odds every day of his life." "It seems odd that he'd wave the white flag to cancer." "He didn't." "Sam wasn't sick." "We had him under surveillance for months." "Ten days ago, we found the smoking gun, an account in the Turks and Caicos Islands." "Eight deposits, over 50 grand at a time." "Who from?" "The Chinese." "Dear God." "I was supposed to confront him." "Plan was a signed confession for the archives, followed by a dignified resignation." "So did he sign?" "No, I never got that far." "An hour after I called to meet, he was dead." "He must have known we were on to him." "But it could have been handled better." "I should have handled it." "Listen, Walker made his own choices." "He knew the risks." "Then what the hell am I doing here?" "Sorry." "This programme contains some violent scenes" "Yes!" "Whoo!" "Whoo!" "Champ, champ, champ!" "Home run." "Oh!" "Home run." "Next time, you're dead." "Any time, Mike." "You guys need the bathroom?" "No." "Double pistachio then, all round." "OK." "The American Embassy is reeling today after a memorial service for the respected diplomat Samuel Walker, whose career spanned more than three decades." "Officials at the American embassy paid tribute to an outstanding public servant." "It's understood Mr Walker left a suicide note referring to a recently diagnosed cancer." "40 minutes before Samuel Walker was found, he phoned me to arrange to meet." "Needless to say, he never made it." "Coincidence?" "Hardly." "We're leaving." "What?" "We haven't had our ice creams!" "Go to the car, right now." "Hey!" "What's going on?" "Get in!" "TYRES SCREECH" "CAR HORN BEEPS" "Did Walker say what he wanted?" "Just that it was about Basel and went to the heart of the intelligence services." "Less than an hour later he was dead." "Somebody wanted him silenced, Ruth." "HE COUGHS" "Dad?" "Dad, are you OK?" "Dad, what's wrong?" "Dad, what's going on?" "Dad!" "Dad!" "DOOR BUZZES" "Got any coffee?" "Still can't sleep?" "What have you got?" "Do you recognise this guy?" "Should I?" "Michael Braydon, comms expert, ex-Seals, ex-Special Services and most recently on a covert joint op with your friends at GCHQ." "Busy bee." "Not any more." "He had a heart attack yesterday after playing softball with his kids." "I'm sorry." "The Agency Fed-Exed his blood samples back to the States." "Standard practice in unexpected deaths." "The results came back a half hour ago." "Turns out he had traces of oxo-metacaline in his blood stream." "Now you know all about that one, don't you, Lucas?" "MI6's drug of choice when it comes to promoting unhealthy hearts." "Sarah, you can't seriously think it was Six..." "They found a puncture mark on Braydon's left thigh." "It was murder, no question." "One of our guys, in your city, with MI6's fingerprints all over it." "Six aren't the only people to use oxo-metacaline." "Not any more." "Well, I sincerely hope not." "Why would they want him dead anyway?" "Not everyone was a fan." "Braydon's remit was to look at security breaches." "God knows what he found." "All right." "Leave it with me." "Thanks." "Now, how about some breakfast?" "I'm not hungry." "Sarah, I know how close you were to..." "I'm fine, OK?" "Just..." "I'm sorry." "Just give me time." "DOOR CLOSES" "'Is your Walker cover holding?" "'" "Yes, so far. 'Keep it that way." "'We've got a long way to go with this." "No screw ups, OK?" "'" "The American Ambassador's not happy, Harry, and I can't say I blame him." "Two officers in less than a week." "What the hell is going on?" "The honest answer?" "We don't know." "So far we've made no connection between Walker and Braydon other than they both worked for the CIA." "There is one other possibility." "Shortly before he was killed, Walker called me." "Said he had more on the Basel meeting." "Did he give specifics?" "Unfortunately not." "You have to find out, Harry." "If this is connected to Basel, I want it top priority." "Have you heard any more from your contact?" "No, he was terrified about telling me what he did." "Brief your team now." "If these two deaths have anything to do with that meeting, we may already be too late." "The Home Secretary has received a warning from a highly-placed source about a meeting in Basel." "Turns out officers from Western and Chinese intelligence attended, all off the record, all travelling under assumed names." "Their agenda, to re-align the geopolitical map once and for all." "So Darshavin was right?" "Why wasn't I briefed about this?" "Why did you keep it to yourself?" "There was nothing substantive, it was all rumour." "That's changed with Walker's death." "We need to find out what it was he was about to tell me." "And why it was worth killing for... twice." "What do we know about the building where Walker died?" "It was being used by the CIA as an observation post." "When the Met attended, they found all exits and entrances secure." "They impounded Walker's body so fast, the Home Office pathologist was still in his PJs." "CCTV?" "All feeds conveniently disabled." "Can we get feed from the vicinity?" "Shouldn't be a problem." "Traffic in and out, one mile radius, two hour window." "What about Braydon?" "He was working with GCHQ on a suspected security breach and the CIA are pointing the finger at us." "Six wouldn't use oxo-metacaline, not now it can be traced." "Assuming it was ever actually in his body." "You think Sarah's lying?" "It wouldn't be the first time the CIA have falsified blood tests." "Sarah could just have been the messenger." "In which case this whole thing could go a whole lot higher, and deeper." "PHONE RINGS" "Yes?" "'Still saving the free world?" "'" "Who is this?" "'Coleville.'" "Jack Coleville." "My God." "How are you?" "I have something I think you'll find interesting." "'The old place?" "Half an hour.' Jack, I..." "Thanks for coming, Ros." "You knew I'd come, Jack." "Are you OK?" "Just tired." "Enjoying retirement?" "No." "You still love the job?" "No regrets?" "Nothing the occasional vodka can't sort." "I've missed you, Ros." "Did I do right by you?" "Getting you involved?" "I worry about that sometimes." "No, I wouldn't have it any other way." "You mean that?" "No husband?" "Family?" "You said you had something for me?" "Always the professional." "You know how it is, Jack." "You're not serious?" "Your memoirs?" "Just the first few chapters." "Why?" "When one gets to a certain age, one thinks of posterity." "You know the scrutiny committee will never allow this through?" "Plenty of foreign publishers out there." "Yeah." "Just don't expect your driving licence to work, or your passport, or your credit card." "You know the Service, Jack, they don't like bright lights in dark places." "I need to get them published, Ros." "They're all I have left." "I dabbled in some investments, got out of my depth." "I've been very foolish." "But this..." "My past is the only asset they couldn't take." "Please." "Read them." "Then give me a call and tell me what I can get away with." "OK." "I'm flattered." "I knew you'd help." "MOBILE PHONE BEEPS" "Sorry." "Of course, of course." "Oh, you may find chapter three of particular interest." "It's all about Harry... and Gibraltar." "Good to see you, Jack." "Her story adds up." "Sarah phoned Walker to arrange a meeting, he got scared, realised the game was up." "Why didn't she tell us earlier?" "No-one likes washing their dirty linen in public." "Walker was very dirty." "For which we only have Sarah's word." "Sorry." "I suppose what it comes down to is whether we think Walker was the type." "You knew him, Harry." "Walker was a political operator, but he's also an old-fashioned patriot, with an old-fashioned sense of duty." "I can't see him selling out to the Chinese." "If the suicide's a smokescreen, it brings Braydon back into the frame." "If Braydon had found a serious lapse of security, the first person he'd tell would be Walker." "He'd take a steer from him before sharing anything with GCHQ." "Braydon gives intel to Walker, Walker contacts Harry." "And someone feels so threatened they give him the push, literally." "We need to focus on the big question." "How deep inside the CIA does this go?" "We need to find out what went on inside that building." "'The swipe reader is straight ahead.'" "Got a package for you, mate." "Place is closed." "Can you sign for it?" "No." "No packages." "Got to deliver it, mate." "Like I said..." "Yeah, yeah, I get the message." "Just gotta make a call." "Mel, I'm at the Gordon Street drop off." "I've got a jobsworth who won't sign." "Contact made." "Starting download." "Dispatch wants to talk to you." "This is City Fast Couriers, you got a problem with the package we are trying to deliver to you?" "I'm not authorised to take any packages." "What none at all?" "No packages?" "Not a single package?" "None at all." "What am I meant to do with it, I don't want to bring it back here." "It's not a discussion, OK?" "No packages, period." "You're not being very helpful." "It's bloody rude." "All I want to do is deliver a package." "That language is not necessary, ma'am, you have a good day." "Yeah, you too." "Yeah, what do you want me to do?" "Come on." "80%." "Er, 20 minutes?" "Traffic's not too bad today." "Transfer complete." "Bring her home." "On my way." "Thanks a lot, mate." "Really helpful." "I pulled details of Walker's mobile calls 72 hours before he died." "It's nothing out of the ordinary." "His family, the office, one to his bank, pretty much what you'd expect." "Maybe even too much what you'd expect." "A dummy phone?" "His records were surprisingly easy to access." "Any trace of any other mobiles he may have used?" "Not that I could find." "And he chose to use a payphone to call you, which suggests he didn't trust his mobile." "So maybe it was his real phone." "Cross reference with numbers he called, see how far back we can trace it." "Your message said you had something?" "More what we haven't got." "The package at the CIA did the trick..." "We downloaded data from the card swipe for the last 14 days, then bracketed either side of Walker's death." "Nobody in, nobody out." "So no-one was with him." "He did commit suicide." "He wasn't there either." "According to the database, no-one went in or out, not even Walker himself." "We know Walker called Harry from a payphone near the Hammersmith flyover at 6.43." "But after that, there's no record of him swiping back in." "Which means he wasn't in the building where he killed himself." "Kind of existential, isn't it?" "So what's the deal?" "Somebody wiped the data." "See all those zeros?" "That's the intel we wanted." "There's nothing in a 20-minute window either side of Walker's death." "Professional job?" "It looks like it was done in a hurry." "Harry, I saw Jack Coleville this morning." "THE Jack Coleville?" "How is he?" "He didn't look well." "Oh, I'm sorry to hear that." "Never understood why Jack opted out." "We all assumed he'd end up running the Service." "He told me to ask you about Gibraltar." "Gibraltar?" "Never been there." "Really?" "Really." "Give him my best if you see him again." "MOBILE PHONE RINGS" "Yep?" "What do you think, literary masterpiece?" "Shoe-in for the Booker?" "Jack, I am so sorry, I've only had a chance just to flick through it." "Bit of a shocker about Gibraltar, don't you think?" "Should get some media interest." "You got it wrong, Jack." "Harry was never there." "You mean when you asked him, he denied it." "Yes." "Remember interrogation training?" "Of course." "My little aphorism." ""There is no art to find the mind's construction in the face." You know how the rest goes." ""He was a gentleman on whom I built an absolute trust." Macbeth." "I was there, Ros." "I saw what he did with my own eyes." "Check the records." "Harry Pearce, Gibraltar, 1983." "You'll see." "That's three dead officers in a week and the latest is one of ours." "Alex Winchcombe, born 1957, BA and PhD in Modern Languages." "MoD for eight years, three seconded to the US Army in the early '90s." "Joined us from GCHQ in '95, as an expert in Balkan dialects." "He's been on the fourth floor ever since." "Apparently, he's one of only two experts in his field." "Was." "How did the police know he was one of ours?" "Someone left a helpful note." "It's a full CV." "Complete with details of every operation he worked on." "Half this stuff's classified." "He was in Gibraltar?" "Yes, he was stationed there for a couple of years. '83 to '85." "Walker, Braydon, Winchcombe." "Is there a connection?" "Get a full breakdown of all Winchcombe's postings and liaison officers, including the Americans." "Specifically Samuel Walker and Michael Braydon." "Ruth, dig up the personal - relationships, finance, recent trips abroad, usual stuff." "And get a printout of all Winchcombe's calls over the last couple of months." "Whoever compiled this had full security clearance." "If they can get this level of detail, what else have they got access to?" "Just about every asset we have." "Contact all serving officers, increase alert levels across the board." "That includes us." "With this kind of access, we're all at risk." "We need to stop this before any more MI5 officers are killed." "As I thought, pure fiction." "No element of truth?" "Ros, do you really imagine I murdered an innocent civilian during interrogation?" "No." "Thank you." "So why write it?" "Jack knew it would take me about five minutes to check the system." "There were rumours after he left, of a breakdown." "He seemed perfectly rational." "And desperate for cash." "Sensational stories sell and are almost impossible to disprove." "Of course." "I'm sorry, Ros." "I know how important he was to you." "He was a fine officer." "Oh, my God." "Jack." "There must be something, Tariq." "There's something here all right." "Combo Bluetooth/Wi-Fi chip." "It intercepts local Bluetooth traffic and re-transmits it via a short-range network." "So it's data, not audio?" "Yeah." "It's designed to capture keystrokes from wireless keyboards then pass them on." "There should be a relay somewhere outside the building hooked up to a mobile." "From there you could send the information anywhere in the world." "So Coleville could have a record of every single keystroke I've made?" "Yeah." "It's a pretty neat piece of kit." "He knew I'd check his accusations against your record and once I did..." "He got a copy of your password." "What's the damage?" "Can't be sure until I run a full history check." "We know Coleville accessed all of Winchcombe's records." "But he didn't give Ros the folder until after Walker and Braydon's death, which suggests he already knew enough about them." "Why would he take out one of his own?" "He was fiercely loyal." "He lived and breathed the Service his whole life." "It just doesn't add up." "What are our options on data security?" "I can do an emergency reset." "Shut the system down, block all known passwords." "If he tries again and he's locked out, he'll vanish." "But if we don't, he can access whatever he likes." "I could set up a mirror site with a time lapse, give us a time to react if he tries again." "How long would that take?" "A bare bones copy, maybe an hour." "Do it." "How does Coleville make contact?" "Phone, never the same number twice." "We have to find him." "We have to go through everything we have on him." "If Coleville tries to access the database again, can you monitor what it is he's looking at?" "Shouldn't be a problem." "Call me the second he tries." "If he gets too close to classified files, pull the plug." "Shut him out." "Coleville's chip, is it still transmitting?" "I deactivated the battery until the mirror site's up and running." "Turn it back on." "Isn't that a bit risky?" "The Bluetooth hooks up to a mobile, right?" "Yeah." "Which then calls another mobile." "Which we can triangulate, as soon as the call goes through, and find Coleville." "Smart boy." "We've got an address for Jack." "Get on to CO19." "No, Harry, we don't know for sure." "Ros,"