Blue Murder season 3

PC Eddie Carter attends to a teenage girl who is knocked down and killed by a car speeding from the scene of a jewelery robbery. Carter is preparing to take the getaway driver to the station to make a statement when he is shot and killed. DCI Janice Lewis and her team investigate.

A three-year-old boy has been missing for a week when a child's body is found. The boy's family comes under suspicion, but DNA tests establish that the body is not that of the missing boy.

Alan Hickson strangles his wife, Paula, with a dog chain after she drowns his dog in the garden pond, and is sentenced to three years in prison. He is released after having only served 18 months, but he is soon found dead - having been strangled with a dog chain.

A diver discovers the remains of a career criminal reported missing two years earlier. A group of friends who used to fish together in the same area have been dying in suspicious circumstances.