A student at Rod Jessop's school is reluctant to talk about who wounded him with a knife on the way to school, but some dogged routine work by Reg and Diane searching through CCTV footage eventually gives the team a lead, linking the incident to the disappearance of paroled prisoner Jimmy Collins, last seen stealing bandages from a chemist's shop. The sight of Gina Gold in her glad rags prompts June to wish for early retirement - and an early wedding. Broadcast 8 February 2007.
A murder hunt is launched when Reshna's body is pulled out of the Thames and evidence emerges that she was having an affair with a fellow student. Meanwhile, Diane and Mickey are left in the dark when an eccentric mugging victim claims to be an undercover officer and Scotland Yard refuse to confirm or deny her story.
Still working in uniform, Phil Hunter retrieves a snatched bag containing £15,000. The owner eventually admits that he is being blackmailed for a marital indiscretion. Phil sets up a sting to catch the blackmailer. Meanwhile, pressure is put on Martin Turnbull, a witness waiting to give evidence against his brother-in-law Ray Moore.