Lucy Brown as Claudia Brown; James Murray as Stephen Hart; Hannah Sprearritt as Abby Maitland; Douglas Henshall as Nick Cutter; Juliet Aubrey as Helen Cutter; Ben Miller as James Lester; Andrew Lee Potts as Connor Temple; Mark Wakeling as Captain Tom Ryan; Karl Theobald as Oliver Leek; Naomi Bentley as Caroline Steel; Hannah Spearritt as Abby Maitland; Ruth Kearney as Jess Parker