New Tricks: London Underground

Sasha is forced to work with her ex-husband Ned Hancock when their teams investigate the death of film critic Oliver Houghton, whose body was discovered floating in the Thames. UCOS delves into the victim's past and explores his link to the murder of a conceptual artist 20 years previously, while Hancock's knowledge of London's hidden past proves invaluable when a piece of occult footage from the 1970s plunges the investigators into the macabre world of human sacrifice. Tamzin Outhwaite and Denis Lawson star, with a guest appearance by Barnaby Kay