Guest Stars Benedict Wong as Pete Cheng Philip Glenister as DCI William Bell Rebekah Staton as Liz Amelia Bullmore as Helen Preger Marc Warren as Dominic Foy James McAvoy as Dan Foster Johann Myers as Sonny Stagg Michael Feast as Andrew Wilson Deborah Findlay as Greer Thornton Tom Burke as Syd James Laurenson as George Fergus Christopher Simpson as Adam Greene Maureen Hibbert as Olicia Stagg Sean Gilder as Sergeant 'Chewy' Cheweski Rebecca Ryan as Karen Collins Shauna MacDonald as Sonia Baker Charlie Ryan as Louis Collins Stuart Goodwin as Robert Bingham Pui Fan Lee as Joy Cipriani Natasha Wightman as Sheena Gough Nick Brimble as Dept. Chief Constable Janson Peter Sullivan as Stephen's Lawyer Andy Linden as Hotel Receptionist Cara Kelly as Della's Double Simon Hoggart as Journalist Matt Hickey as Arty Neighbour