Guest Stars Rosalind Eleazar as Louisa Guy Saskia Reeves as Catherine Standish Christopher Chung as Roddy Ho 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 Tom Wozniczka as Patrice Joshua Lacey as Tattoo Dog Kiran Sonia Sawar as Agent Giti Rahman Leroy Kincaide as Beard Dog Matthew Amroliwala as Himself Mat Betteridge as Westacres News Presenter Nick Moss as Old Dog Robbie O'Neill as Young Dog Seattle Yangoue as Teenager Andy Apollo as Upscale Hotel Staff Chi Lewis-Parry as Bodyguard 1 Russell Bentley as Upscale Hotel Doorman Khalid Laith as Tahir Alex Dowding as Young Sam Chapman Verity Hayes as Young Isobel Katie Pattinson as News Presenter Eliot Giuralarocca as Upscale Hotel Concierge Jack Staddon as Young Frank Harkness
