Gerry is spooked with the discovery of the Unsolved Crime and Open Case Unit's latest victim – a cop whose body has lain untouched under a basement for 30 years.
With accusations of police corruption and underhand dealings coming out, Gerry has to face the skeletons in his own closet. Can the team help him before the past catches up with him?
It's not long before he thinks he has the key to the investigation and goes off on his own to uncover the truth.
New Tricks, BBC1, 9pm
Try Reveal's digital edition on iPhone & iPad. Subscribe now & never miss an issue!