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 Bally Gill as Agent Singh Joanna Scanlan as Moira Tregorian Joshua Lacey as Tattoo Dog Mat Betteridge as Westacres News Presenter Farid Larbi as French Taxi Driver Matthew Amroliwala as Himself Michael Akinsulire as Boss Dog Alisha Williams as Agent Davies Christos Lawton as Forensic Officer Brinsley Terence as Westacres Dog Omar Shaker as Newsagent Zachary Hart as Robert Winters Will Austin as Small Dog
