New Tricks is a British crime series that has aired for ten seasons. What distinguishes it is the mix of humour and investigation (it has more ongoing humour than in Midsomer Murders). I was skeptical at first but the show offers serious police procedure and a different cold case each week. On the plus side, it's not gory or forensic-based unlike nearly every show on TV for the last few years.
In New Tricks, retired police make up the Unsolved Crimes and Open Case Squad. Brian is a recovering alcoholic with OCD, Jerry the lad with multiple ex-wives and a gambling urge, and Jack, a widower who still converses with his wife who's buried in his back yard. Heading up the team is Sandra, the long-suffering chief superintendent whom everyone assumes is someone's girlfriend.
If you are already enjoying this series, check out their earlier endeavors:
Circles of Deceit, starring Jerry (Dennis Waterman) and Brian's wife (Susan Jameson) in a not-so-meek-and-mild role as the Controller.
Garrow's Law, the 18th century courtroom drama, in which a younger Brian (Alun Armstrong) plays a judge.