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 Tom Brooke as JK Coe Ruth Bradley as Emma Flyte 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 Robbie O'Neill as Young Dog Eliot Giuralarocca as Upscale Hotel Concierge Seattle Yangoue as Teenager Andy Apollo as Upscale Hotel Staff Chi Lewis-Parry as Bodyguard 1 Alex Dowding as Young Sam Chapman Verity Hayes as Young Isobel Russell Bentley as Upscale Hotel Doorman Khalid Laith as Tahir Katie Pattinson as News Presenter
