When Slater is recommended by Rawton for undercover work, he is overjoyed. His colleagues however ridicule him, and their interference almost costs them a trial operation. Will he bottle it?

Boyden and Page grill a witness after the disappearance of a good-time girl.

PC Edwards and PC Smith are called to a disturbance at a local bank, where they are surprised to find Tosh Lines' wife and children causing a commotion as there is no money left in their account. Edwards makes a discrete call to Sgt. Peters, who suggests to Tosh that he head down to the bank and sort things out. As PC Ramsey and WPC Ackland also arrive, the bank is raided by an armed gang. Tosh Lines arrives and charges towards the bank, but as PC Ramsey runs to stop him, he is shot in the chest by one of the robbers. Ch. Insp. Conway negotiates with the gang as armed PT17 officers surround the building. Sgt. Cryer offers to drive the getaway car, but disconnects the ignition when he leaves it at the bank entrance. PC Smith and the other hostages are released, but PC Edwards is taken hostage. He manages to makes a run for it and the PT17 officers open fire on the car.

Will starts on his first case as a trainee CID. Will finds himself having to go undercover.

Zain gets a frosty reception at the station when Heaton secures his release from prison to help Meadows with the recapture of escaped killer Jason Forbes, and Will can't help taking a swing at the man who callously disposed of Honey's body in a bid to save his own skin. Unsurprisingly, Zain encounters hostility from several of his former colleagues. The pursuit leads to a gunpoint showdown, giving Zain a clear choice between escape and doing the right thing.

Nadir comes back to work in a relieved state after Meadows all but admits defeat in their search for Kristen Shaw. However, he is brought back to earth with a bump when Gold reports Harman missing to Meadows, with her last phone call coming on the day Eva Garcia disappeared. Tracking down Shaw, Nadir and his lover execute a plan to plant a lookalike on Harman's flight to Tenerife, but the Sun Hill team aren't fooled when they find the CCTV. With phone signals pinging at Bonham Wharf, Nadir panics that he is about to be caught and plans to flee. Keane and Hardy find a heavily pregnant female at the bottom of a flight of stairs after an apparent burglary, but it appears her partner may be implicated when it is revealed her stolen watch was originally stolen in another burglary, involving Heaton's estranged wife Rhiannon.

Martella applies for a position in the Bermuda police force, but after being punched during a fight, and failing to prevent a suicide jumper, she feels she is not up to the job and withdraws her application. Roach investigates a fight at a hostel for drunks. Patel investigates another racial attack. During followup, Carver is worried about himself not liking Asians. Penny has started yoga and thinks everyone else should do it too.

P.C. Reg Hollis has been nominated for the position of the station's Federation Rep. He's sure he's a shoo-in, but P.C. Shaw tells him W.P.C. Ackland has applied as well. A D.A.C. visits Sun Hill at the same time as a brownie pack. The ""Tom Squad"" is out in force, cracking down on prostitution in Sun Hill. Due to the VIP visitor, Shaw and Edwards are unable to process the ladies they have arrested, and sit with them in the van until the D.A.C. has left the building. P.C. Carver goes to warn a prostitute, Shirley, about the crackdown, as she is a snout for D.I. Galloway, but is he is stopped by P.C. Edwards and P.C. Shaw who tease him about curb-crawling. D.S. Ted Roach and P.C. Yorkie Smith go to a case conference with social workers when it is suspected a young girl is being assaulted by her mother. Roach doesn't seem interested as he thinks social workers are useless, but once the meeting is over, Roach organises a raid to take the little girl into protective custody.

When her car breaks down on the way to the station, DC Viv Martella misses an important CID briefing about an obbo on a suspected armed robbery, and is furious when she is taken off the case by DI Frank Burnside. As CID and SO19 wait outside the target, Martella and PC Tony Stamp follow up a simple case to arrest a suspected bag snatcher. As they wait outside the suspect's house, a van pulls up, obscuring their view. Having missed the briefing, Martella fails to recognise the van's occupants as the armed robbers, and when she approaches their van she is shot and killed. Stamp is wounded, but manages to give a description of the van which is spotted by a traffic police motorcycle. As the India 99 police helicopter and SO19 cars pursue Martella's killers across London, PC Loxton and WPC Ackland disobey Ch. Insp. Cato's orders and pursue the suspect vehicle in the Area Car. The vehicle hits a bulldozer and explodes, killing all inside.

Viv and Ken go to an army surplus store that seems to be being supplied off the back of a lorry. Van used to deliver the gear was nicked from Yorkshire. 2 redcaps (who don't think much of police) turn up to collect squaddies. Cryer doesn't think they are kosher. Cryer wants someone for a p.a. job at local school and asks Ken to buy a flying jacket. An ice-cream van and a car cause a traffic snarl-up near the station. Roach sends a traffic warden to sort it out. Hollis is also sent out to deal with it. After walking around the block, Hollis comes back to find part of a funeral has now joined the bigger traffic jam.

Viv has hay fever and tries to get medication but is called to a café with a dead body and is man-handled by the deceased's son. Yorkie visits a lady with agrophobia who thinks her neighbour is being burgled. He gets on their truck and helps June and Haynes arrest them. Haynes and Ackland run into a drunken driver in a bus garage using a sledge hammer to break windows.

P.C. Ramsey and P.C. Haynes attend a flat where the occupants have discovered a decayed skeleton in the wall where they were going to build a fireplace. Sgt. Cryer, D.S. Roach and D.C. Dashwood are called in, and a forensic expert soon arrives to examine the body. What looks like a baby's body is also found, but it turns out to be a doll. While CID search for former occupants and interview the Trants' obnoxious neighbours, a note is found in the wall from a merchant sailor who couldn't afford a funeral, so he put his dead wife's body in the wall.

Recently promoted to CID, D.C. Carver is feeling seasick while he and D.S. Roach work on a case on the police launch. The River Police fish the body of a murdered informant out of the Thames, but Roach is furious when the case is taken over by two detectives from Scotland Yard. P.C. Taffy Edwards and Stamp attend an incident with an unconcious elderly man who has a very protective dog. A woman offers to help, but Stamp tells her to move along. Stamp is horrified when the woman arrives at Sun Hill as the new uniformed Inspector, Christine Frazer. P.C. Hollis is running a sweep on who D.I. Galloway's replacement will be - there are rumours it will be D.I. Burnside. At the hospital, a solid gold krugerand is found on the old man, and W.P.C. Ackland and D.C. Carver realise the body in the river is the old man's nephew, who was grassing on his accomplices in a krugerand robbery. Sgt. Penny is back at work on light duties, but he is clearly still deeply affected by his recent shooting.

P.C. Jim Carver is sent to the morgue to investigate a suspiscious drowning. The victim has clearly been planted with several items such as theatre tickets, badly-fitting clothes and an odd suicide note. D.S. Roach has a theory it's an assassination by the British secret service, meanwhile trying to get permission to conduct an obbo from an office building. D.I. Roy Galloway and D.C. Mike Dashwood are reprimanded by a judge for not bringing all their evidence in a fraud case to the court. They race back to Sun Hill in the recess to retrieve the documents, but on the way back, Galloway runs into a black cab. An argument ensues, and Galloway nicks the cabbie for breach of the peace. Half the cabbies in London blockade the station in protest. P.C. Nick Shaw is slashed with a knife when breaking up a fight between two brothers-in-law, but Sgt. Penny refuses to charge the suspect. An Asian man arrives at the station to report continued harrassment, and a young boy is brought in for graffiti

P.C. Stringer wins the election for the post of Federation Rep, beating the incumbent P.C. Hollis by fifty-eight votes to two. Ch. Supt. Brownlow decides to eat in the canteen with the other ranks, much to their discomfort.

Lines sits in on a poker game at a mini cab office. Illegal gambling is suspected. They raid the wrong place. Cathy moans to Taffy about putting the cards back. she is set up by Carver and Lines. She later gets her own back. Garfield is decoy for muggings on pizza delivery boys.

Because of a screwup, Burnside has put back community relations 30 years. Conway yells at Burnside before burnside goes to see Brownlow. Conway then goes to see Cryer who tells him what he thought the situation was. Yorkie is accused of making racist remarks while arresting one of the girls but Ramsey is the real culprit. The headmaster of the school comes to talk to Brownlow.

Sgt. Cryer brings in an assault victim who is reluctant to report a rape. Jane has problems interviewing the rape victim (Debbie) because of her friend's (Sandra) constant interference. Sandra then tells Muswell that Debbie got what she deserved from Sandra's boyfriend Roach investigates a burglary with the householder claiming more jewelry was taken than was recovered. The burglars are denying they took the extra stuff

A young mother caught shoplifting at a supermarket confesses to Sgt Cryer that she is in debt to local loan shark 'Aunty' Peg Miller. PC Edwards checks cases of fly tipping (unauthorised dumping of rubble) in the area and discovers some disaffected Welsh miners may be responsible. A Mrs Taylor makes a complaint about a noisy neighbour, but when WPC Ackland investigates, she finds the neighbour dead.

A man is throwing tiles off a roof and P.C. Lyttleton, who is suffering from vertigo, is sent up to arrest him. A Polish sailor turns up at the station seeking political asylum. D.S. Roach and D.C. Dashwood catch a man who has been ripping people off posing as a gas board official. Ch. Supt. Brownlow talks to P.C. Edwards about taking a position in the coroner's office. Sgt. Cryer is shocked when Mrs. Penny accuses her husband of beating her up.

Sgt. Cryer is taking half the relief out on Sun Hill's annual fishing trip. P.C. Smith and D.C. Dashwood go to serve a warrant on Russell Archer over a non-appearance in court on a poaching charge. Archer manages to escape from Dashwood and Smith, and is later seen menacing a milkman with a sawn-off shotgun. He later holds up a bookies and a greengrocer, until he is spotted by P.C. Carver and P.C. Frank. who give chase. Frank is shot and wounded during the chase, and Archer ends up taking an elderly woman hostage in a retirement village. With the fishing trip cancelled, D.S. Roach takes charge of the siege operation until D.I. Galloway and Ch. Supt. Brownlow arrives. Attempts to contact the increasingly unstable Archer fail, until he asks to speak to Sgt. Cryer whom he saw in the betting shop. Cryer enters the flat, and attempts to talk Archer into giving himself up. With W.P.C. Ackland posing as a Meals-on-Wheels driver, Galloway, Roach and PT17 officers storm the flat and shoot Arche