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 Ṣọpẹ́ Dìrísù as Michael Antwi Mark Bonnar as John Halliday Leanne Best as Abigail Strickland Sam Stockman as PC Rose Ian Peck as Peter Mackie Thomas Dominique as Big Ray Glyn Grimstead as Sgt. Douglas Trimble