New Tricks >> Season 12

In the ultimate series finale, UCOS are threatened with closure following their perceived mishandling of the Henway case. Their final case begins with the bloody murder of a political activist 15 years ago at the Madhouse - a hub for people with mental health issues. Just as the team are getting somewhere, the order comes from above for Ted, Danny and Steve to cease the investigation. But in true UCOS spirit, the boys throw away the rulebook and uncover something much bigger than just a straightforward murder, involving some top officials, a multinational drugs company and signs of a massive cover-up. Danny and Fiona's relationship hangs in the balance as she must give an answer to the job offer in Aberdeen, and Sasha is pulled into a game of political cat and mouse as she realises UCOS are merely puppets in Cynthia's game.

A blood-stained bust is uncovered during some reconstruction work in a cemetery, pointing UCOS to the murder of an alternative medicine practitioner bludgeoned to death seven years ago. The evidence leads to the pioneering but controversial world of cryopreservation - the practice of keeping clinically dead patients frozen in time to extend their lives. In a sensitive case, with the watchful eyes of their bosses upon them, Sasha is determined that her team won't put a foot wrong. But with suspects constantly running rings around them and the sobering possibility that two perpetrators are still at large, UCOS must go out on a limb to unlock their most difficult cold case yet. Fiona is offered a job too good to be true in Aberdeen, leaving Danny bereft at the thought of losing her. Ted is devastated when he realises he's lost his lucky cigarette case, and Sasha has an interesting offer from the notoriously cut-throat assistant commissioner Cynthia Kline.

A skeleton uncovered in the foundations of a swimming pool is identified as Cheryl - a young, pretty lottery winner reported missing 17 years ago. UCOS' prime suspects are her quiz teammates, who won their lucky windfall as part of a syndicate. But while some have put their money to good use, the victim's boyfriend has fallen on hard times, and the media remain convinced he is the prime suspect in her murder. As allegations of affairs, fights and betrayal begin to surface, the team are left to ponder whether money really is the root of all evil. Sasha is set for a night in studying, but the boys have different plans and plot to set her up with Fiona's colleague Adam.

As the detective drama returns, Gerry is spooked by the discovery of UCOS's latest victim - a cop, whose body has lain untouched under a basement for 30 years. As accusations of police corruption and underhand dealings begin to surface, Gerry has to face up to some skeletons in his own closet and it's a race against time for the team to help before his murky past catches up with him. While babysitting his grandson, Gerry becomes convinced that only he holds the key to the investigation and goes Awol to uncover the truth.