Sarah Williams Creator, Writer, Executive Producer Francesca Annis Vivien Actor Imelda Staunton Mary Actor Stephen Rea Mark Actor Russell Tovey Jake Actor Claudie Blakley Helen Actor Lydia Leonard Natalie Actor Keir Charles George Actor Sharon Small Stella Actor Vincent Regan Tony Actor Lara Rossi Leila Actor David Bamber DI Doug Lineham Actor Grace Hogg-Robinson Lily Actor Clara Indrani Meera Actor Stephanie Langton Carla Actor Karan Gill PC Isaac Cory Actor Ayden Beale Aaron Actor Mia Lloyd Maddie Actor Louise Hooper Director Letitia Knight Producer Kate Bartlett Executive Producer