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