Lou panics when she returns home from a night-time drug deal to find Mason missing. She soon spots him, sleepwalking, but the fright makes her vow to become more responsible and leave behind her life of crime - which proves easier said than done. Gemma helps the police build the case against her husband, going to extraordinary lengths to protect her identity, while Francesca reluctantly attends a prison-run marriage guidance course with Paul, who hopes they still have a future together. Natalie Gavin, Emma Rigby, Polly Walker and Iain Glen star.