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