Guest Stars Ralph Ineson as Steward Hart Georgia McCutcheon as Theresa Maloney Lloyd Hutchinson as Chief Steward Lattimer Diana Kent as Eleanor Widener Miles Richardson as John Jacob Astor IV Larina Mészáros as Loraine Allison Simon Paisley Day as Sir Cosmo Duff-Gordon Ifan Meredith as Fifth Officer Lowe Péter Kõszegi as George Widener Angéla Eke as Madeleine Astor Olivia Darnley as Bessie Allison Cian Barry as Fourth Officer Boxhall Ben Bishop as Stoker Lyons Shane Attwooll as Billy Blake Matt Devere as Boilerman Joseph May as Giglio Sally Bankes as Mrs. Gibson John Kazek as Steward Turnbull Will Keen as Chief Officer Wilde Beatrice Zentai as Woman 1 at Purser's Mike Kelly as Seaman Royce Alexis Latham as Man in Corridor Iain McKee as Seaman Scott Eszter Zakariás as Woman 2 at Purser's Richard Sutton as Second Officer Blair