Jimmy McGovern Creator, Writer Anne-Marie Duff Mo Actor Olivia Colman Sue Actor John Bishop Peter Actor Robert Sheehan Stephen Actor Sheridan Smith Charlotte Actor Thomas Brodie-Sangster Jake Actor Joe Dempsie Riley Actor Josh Bolt Dom Actor Oliver Lee Sean Actor Stephen Graham Tony Actor Sean Bean Simon, Tracie Actor Anna Maxwell Martin Tina Actor Christopher Eccleston Actor Mackenzie Crook Actor Juliet Stevenson Actor Peter Capaldi Actor Andy Serkis Actor Marc Warren Actor Naomie Harris Actor Warren Brown Actor