Guest Stars Amelia Bullmore as Helen Preger Rebekah Staton as Liz Benedict Wong as Pete Cheng Philip Glenister as DCI William Bell Marc Warren as Dominic Foy Johann Myers as Sonny Stagg James McAvoy as Dan Foster Tom Burke as Syd Christopher Simpson as Adam Greene Sean Gilder as Sergeant 'Chewy' Cheweski Shauna MacDonald as Sonia Baker Patrick Brennan as Neil Woods Michael Pennington as Richard Siegler Ofo Uhiara as Security Guard