Carl and Akram recreate the fateful ferry journey on their way to the Isle of Mhòr. A frustrated Rose makes her case for joining their Department.

Cast: Matthew Goode, Chloe Pirrie, Jamie Sives, Alexej Manvelov, Leah Byrne, Kelly Macdonald, Kate Dickie, Tom Bulpett, Aaron McVeigh, Shirley Henderson