The Bill: Witness: Innocent Blood

First of an eight-part story. Smithy helps the victim of a knife attack on the Jasmine Allen estate and renews acquaintance with Carly Samuels, a girl he had been helping, who witnessed the incident. It soon emerges that Carly is afraid of her violent boyfriend and keen to start a new life miles away from London. Meanwhile, Beth and Nate encounter a young carer who seeks relief from his responsibilities by setting fire to cars