Episode 3.1

S3 E1: Teenager Cassie Booth disappears whilst on her paper round and her clothes are found in a boat house belonging to Karl Wilding, a business with an alcoholic wife Rebecca. Wilding is the prime suspect but then seemingly helpful Stephen Warrington, a wine merchant who has initially brought a complaint about a house being used as a brothel, demonstrates too much interest in both the case and in Pat North, now living with Walker as his partner. Warrington is a man with bipolar disease who suffers from frightening mood swings - as Pat will discover.