Guest Stars Nina Wadia as Dr Anita Rhys Evans Karl Johnson as James de Cadenet Jamie Sives as Karl Mortensen Chizzy Akudolu as Addy Smith "The Squeak" Eileen Davies as Julia de Cadenet Risteard Cooper as Si Robertson Henry Helm as Josh Thea Barrett as Polly Isabelle Mullally as Annie Ariyon Bakare as Dougie Thompson Grace Calder as Savannah Adrian Hood as Kenneth Baines Madeleine Demetriou as Abigail Robertson Stephen McCole as Johnny Hapgood Delainey Hayles as Billie