Emilia Fox Dr Nikki Alexander Actor David Caves Jack Hodgson Actor Maggie Steed Actor Eileen Davies Actor Sam Gittins Actor David Hargreaves Actor Iman Marson Actor Matthew Earley Actor Sean Pertwee Actor Jason Callender Actor Kate Okello Actor Charlie Rix Actor Eileen Nicholas Actor Billy Boyle Actor Amy Booth-Steel Actor Lisa Davina Phillip Actor Sedhar Chozam Actor Adrianna Bertola Rosie Actor Ethan Tang Ethan Actor Ricky Shah Mr Goddard Actor Precious Adeyemi Teenage Girl Hiker Actor Jack Condon Angry Candidate Actor Timothy Prager Writer, Executive Producer Suzi McIntosh Executive Producer Sean Gleeson Producer Tracey Rooney Director