New Tricks: Ghosts

A 79-year-old woman with dementia runs away from her care home and turns up at a south London police station to report a murder - sparking a reinvestigation into the mysterious disappearance of her police officer husband in 1956. The official report says that he fell into the river after one too many beers - but what secrets was this seemingly straight-as-a die old-fashioned bobby keeping? Meanwhile, Steve's son is arrested for buying weed, bringing the retired cop face to face with his ex-wife - a woman he hasn't seen in 10 years. Tamzin Outhwaite and Denis Lawson star, with a guest appearance from Julie Graham