by Adam Scott On the trail of a possible lead to Michel Gideon, Alec Walker and Mark Baines find themselves plunged into an even deeper mystery. Cut off from civilisation and trapped in a running battle for survival, Alec is forced to face the consequences of his recent actions ... and to ask himself how far he's prepared to go to atone... Guest Starring Annabelle Wallis | Tom Burke | Rupert Graves | JJ Feild         Stephen Graham | Tom Hiddleston | and Liam Cunningham