The team investigate the murder of a policewoman 17 years ago, but what is Sandra's connection, and what secrets from her days at Hendon are revealed?

Jack Halford hopes a clairvoyant will put him in touch with his late wife. Instead he is contacted by a girl who disappeared twenty years earlier.

New boss Robert Strickland asks the team to reopen the case of David Barrie, a barrister found dead, bound and gagged, in his car in the 1980s. The case was a rare instance of officer-in-charge Ronnie Ross's not getting his man. Chief suspect Michael, now a transsexual called Michaela, had an alibi, but Michaela is involved with Elaine Wanless, a former brothel-keeper who reveals the dead man's penchant for bondage. The team is convinced that both know more about the death than they claim.

Luke Hanson has recently been released from jail after serving 8 years for setting a fire at his local school in which the caretaker had been severely injured. He was across the country committing another crime at the time and would like the team to reopen the case. This was Jack's last case before retiring to care for his wife, who was the victim of a hit and run driver. Supt. Pullman gets an offer of promotion that she is finding very hard to resist, but it would mean leaving the squad. A woman who claims to be his daughter approaches Gerry, and Brian rekindles an interest in war gaming. In the course of investigating the school fire, Jack learns the identity of the hit-and-run driver and decides to take action.

Brian finally locates Jack who returns to the UCOS team but remains silent about his lengthy absence. The team investigates the death of rock star Andy Fletcher, who supposedly committed suicide in 1975. Gerry speaks to a dying woman who suggests otherwise. She overheard a fight just before his death, and although she reported it to the police after Fletcher was found dead, her information is nowhere to be found in the files. The band's former manager Clive Evans found Andy but doesn't believe there was foul play. The three remaining band members all deny any special knowledge of what happened, but one of them kept Andy's royalties.

When junior tennis champion Alice Kemp fell to her death from a balcony in 2010, it was assumed she killed herself as she had lost a crucial match but now a cleaner recalls hearing raised voices just before the death and the case is reopened. Alice's agent, Anthony Marshall, claims he lost a valuable client but admits Alice was considering a change of representation whilst Victoria, Alice's mother, tells the team that David, her estranged husband, a gambling addict, had visited Alice before the fatal match. He admits that he was betting against her for money and asked her to lose the march but denies any foul play. Fawn, the player who beat Alice and took her place as Number One, was nonetheless good friends with her and helps the team find the person responsible for Alice's death though Brian is less successful in trying to get his dog in with a model agency.