Guest Stars Jamie Sives as Karl Mortensen Nina Wadia as Dr Anita Rhys Evans Karl Johnson as James de Cadenet Chizzy Akudolu as Addy Smith "The Squeak" Eileen Davies as Julia de Cadenet Risteard Cooper as Si Robertson Isabelle Mullally as Annie Thea Barrett as Polly Henry Helm as Josh Ariyon Bakare as Dougie Thompson Madeleine Demetriou as Abigail Robertson Islah Abdur-Rahman as Nav Jackie Clune as Leah Worthington Adrian Hood as Kenneth Baines Gina Fillingham as Carol Baker Ria Knowles as Jenny Nathalie Armin as Prosecution