New Tricks: Season 8

The team reinvestigates the death of a paleontologist, after the pathologist who performed the autopsy which lead everyone to believe the death was accidental, is found to have been (ironically) falling down drunk at the time.

The team investigates the murder of an anonymous tramp on a London Underground train 15 years earlier.

The UCOS team are drawn into a world of immigration, Albanian gangs and family feuds when they reinvestigate the death of an unidentified man.

The UCOS team reinvestigates a highly sensitive case when new information links an unexplained death to a series of drug rapes in East London.

Psychologist Samantha Gerson comes to UCOS to carry out a work study on older men. However she also wants the team to look into a suspicious hit and run from six years earlier, the victim being her brother Darren, a cycle courier. Darren suffered memory loss but now as his memory returns, he recalls that the package he was carrying was stolen and suspects foul play. His client - and lover - Claudia Scott, imported Moroccan furniture and Jack suspects a drug connection but Darren was also the founder of GLS, an anarchist group committed to ridding London of cars. When Darren is murdered the UCOS team have to find out how he funded GLS and who wanted him silenced.

Some past memories and feelings are stirred up when Detective Superintendent Sandra Pullman is reunited with an old flame, DCI James Larson.

On February 7th 2004 theoretical physicist Philip MacKenna disappeared from a train on his way to Paris and was never seen again. Now his wife is receiving anonymous emails claiming someone is using his knowledge for their own research.

Stephanie Parr tells the team that her biker boyfriend Reese Chapman, as a rite of passage, must kill a rival gang leader who supposedly murdered his father Eddie, founder of the violent criminal Braves biker gang when she is sure the killer was Marcus York, the club's current president. Superintendent Barlow asks the team to back off as he is surveying the Brave for drug-peddling but when Stephanie is attacked Sandra resolves to continue, despite a lack of witnesses for fear of York and Barlow's unhelpful attitude. David, Stephanie's father, holds the key but the identity of the killer does Barlow no good.

A website highlighting unexplained disappearances alerts the team to the death of young mechanic Christopher Collins seven years earlier. Sandra discovers he was really called Tommy Barton, and was on a witness protection scheme having testified against drugs baron Derek Robinson. He was, though, a drug smuggler himself and was having an affair with his boss's wife. In tracing the killer the team is much aided by the hypnotherapist treating Brian's insomnia and they also learn that UCOS will not be terminated to save money.

In 2006 a zookeeper was found devoured by the tiger he cared for, it was recorded as a tragic accident and quickly forgotten. Now the keeper's housing is being refurbished, and most of the victim's blood is still in the floorboards.