Guest Stars Saskia Reeves as Catherine Standish Christopher Chung as Roddy Ho Rosalind Eleazar as Louisa Guy Aimee-Ffion Edwards as Shirley Dander Kadiff Kirwan as Marcus Longridge Tom Brooke as JK Coe James Callis as Claude Whelan Ruth Bradley as Emma Flyte Joanna Scanlan as Moira Tregorian Sean Gilder as Sam Chapman Tom Wozniczka as Patrice Joshua Lacey as Tattoo Dog Kiran Sonia Sawar as Agent Giti Rahman Nick Moss as Old Dog Leroy Kincaide as Beard Dog Matthew Amroliwala as Himself Mat Betteridge as Westacres News Presenter Russell Bentley as Upscale Hotel Doorman Alex Dowding as Young Sam Chapman Robbie O'Neill as Young Dog Andy Apollo as Upscale Hotel Staff Khalid Laith as Tahir Katie Pattinson as News Presenter Chi Lewis-Parry as Bodyguard 1 Jack Staddon as Young Frank Harkness Verity Hayes as Young Isobel Seattle Yangoue as Teenager Eliot Giuralarocca as Upscale Hotel Concierge
