Finn uses Rory's phobia to bully him into an alliance. Marcella confronts Frank with a discovery about his past. DCI Sangha learns of Stacey's arrest.

Cast: Anna Friel, Ray Panthaki, Kelly Gough, Michael Colgan, Amanda Burton, Aaron McCusker, Jorin Cooke, Eugene O'Hare, Hugo Speer, Orla Mullan, Laurence Kinlan, Mary Moulds