New Tricks

DNA tests on a suspected robber prove his innocence and indicate an earlier crime: the 15-year-old murder of an unnamed vagrant on a tube train. The trail leads the team to the victim's posh relatives, and Brian has a run-in with the homeless community.

New DNA tests on charred remains from 1996 reveal family ties to a fingerprint analyst at the Home Office, drawing the team into a world of immigration loopholes and Albanian gangs. Gerry takes a French cooking class and meets a saucy woman.

The team reinvestigates a decade-old death at the Natural History Museum. Did senior paleontologist Bernard Fletcher die from a fall, or was he murdered? To solve the case, our aging detectives must walk among dinosaurs.

A psychologist arrives to study older men in the workplace and asks the team for help on a personal matter. Years ago, her brother was the victim of a hit-and-run that left him with severe memory loss. Now he claims he was a target--and still is.

Reinvestigating the murder of a respected antiques dealer reunites Sandra with an old flame, DCI James Larson. Meanwhile, Brian's wife is behaving very oddly. Is she having an affair?

New information sheds light on the 2009 death of a market trader. It seems she was drugged and killed by a serial rapist, but with that case still ongoing, the team must look elsewhere for clues. It doesn't help when Sandra's mother comes for a visit.

In 2004, a physics professor disappeared from a train bound for Paris. When is wife receives emails from someone claiming to know the reason, the team reopens the case. Then their boss, DAC Strickland, is warned off by a shadowy Whitehall figure.

When a frightened young woman offers new information about the killing of the leader of a biker gang, the team agrees to reopen the case--and perhaps prevent a second murder. A former colleague tells Sandra that she is wasting her career.

A man found murdered in an alleyway seven years earlier is identified on a website about unsolved crimes. The team reinvestigates the case, but the man seems to have no past. Meanwhile, job cuts are imminent, and Brian and Gerry fear being downsized.

In 2006, the death of a zookeeper found in the tiger enclosure was ruled a tragic accident. New evidence now suggests it was murder. As the team investigates, animal rights activist Brian clashes with the zoo's PR department.