New Tricks: Season 11, Episode 8

11 - 8: The English Defence

As they investigate the murder of interpreter Agnes Bradley, the UCOS team receive a partial DNA match from a teenage boy who once threw a brick onto a motorway. They talk to the boy to try and fond out if one of his male relations could be the murderer, only to find out that his mother was raped and they could be looking for a rapist-turned-murderer.