Guest Stars Vincent Regan as Dominic Carter Derek Riddell as Paul Brightman Daniel Ezra as Dan Johnson Tamara Lawrance as Clem Johnson Shannon Hayes as Ella Johnson Angel Coulby as Julia Redhead Alistair Petrie as Robert Greenlaw Mark Bonnar as John Halliday David Schofield as Alex Brady Sam Stockman as PC Rose Cecilia Noble as Mrs. Antwi Nathan Nolan as Dr. Mark Ambrose Oliver Dimsdale as Mark Neame