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 James Callis as Claude Whelan Ruth Bradley as Emma Flyte Tom Brooke as JK Coe Joanna Scanlan as Moira Tregorian Sean Gilder as Sam Chapman Joshua Lacey as Tattoo Dog Tom Wozniczka as Patrice 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 Jack Staddon as Young Frank Harkness Khalid Laith as Tahir Seattle Yangoue as Teenager Verity Hayes as Young Isobel Alex Dowding as Young Sam Chapman Robbie O'Neill as Young Dog Andy Apollo as Upscale Hotel Staff Chi Lewis-Parry as Bodyguard 1 Russell Bentley as Upscale Hotel Doorman Eliot Giuralarocca as Upscale Hotel Concierge Katie Pattinson as News Presenter
