DCI Banks >> Season 4

Following the disastrous raid Helen is suspended but she tells Banks that her colleague Trethowan reentered the house after the event, leading them both to surmise, correctly, that he was covering up for his girlfriend, the policewoman who Tasered Peter Doyle and Helen is exonerated. Meanwhile Kitson takes Tracy to Jenkins' house, where he intends to hold her as a hostage in return for the gun. However Jenkins ultimately admits to Banks that he is terminally ill and the reappearance of his long-lost illegitimate son, by whom he wanted to do right before dying, angered Kitson to the point of murder . Tracy is ultimately returned to her father.

Matt Barber, whose father Jack is a respected high ranking policeman, and is now a London-based journalist is found murdered in a holiday chalet, owned by Liz Forbes. Liz was the singer with a 1980s band the Crystal Kiss, along with Martin Soames, who is the chalets' caretaker. Matt was seemingly investigating the death of another band member John Gaunt, over thirty years earlier, which, at the time appeared to have been an accident. The remaining band member Ian Basset had returned to England from abroad just before Matt died. He approaches Liz and Martin with the idea of reforming the group - a suggestion made to him by Matt, of whose death he is seemingly unaware. At the same time Martin's lawyer David Hornby is discovered to have been paid by Matt and his finger prints are found at the chalet. He is also the father of Annie's baby.

11-year old Kyle Heath escapes a couple claiming to be social workers who try to force him into their car but next day his mother Katy tells Banks and Helen that they returned and abducted him and the phone number they gave her is false. Mr and Mrs Harris who live opposite confirm the visit but are critical of Katy's parenting and Kyle's behaviour. When heroin is found in the floor-boards of Katy's house Annie believes Kyle was taken to force Katy to give them to the abductors but Katy denies knowledge of it. She suggests Kyle's father, her estranged partner Paul Cain, is the culprit though evidence suggests that Kyle is the actual drug dealer, earning money to spend at an arcade with headmaster Mark Campbell. Then a young boy's corpse is found - though it is not that of Kyle.