A gangland killing takes a surprising twist when it turns out the victim has been sexually mutilated. Andy punishes Janet by keeping her out of the heart of the investigation, and when she rebels, the ensuing argument becomes personal. Rachel feels ambushed by Sean, who announces his mother wants to meet her - especially as she has spent years trying not to think about her own mum. Suranne Jones, Lesley Sharp, Sean Maguire and Nicholas Gleaves star.