Guest Stars Ralph Ineson as Steward Hart Diana Kent as Eleanor Widener Miles Richardson as John Jacob Astor IV Larina Mészáros as Loraine Allison Lloyd Hutchinson as Chief Steward Lattimer Simon Paisley Day as Sir Cosmo Duff-Gordon Ifan Meredith as Fifth Officer Lowe Péter Kõszegi as George Widener Angéla Eke as Madeleine Astor Georgia McCutcheon as Theresa Maloney Cian Barry as Fourth Officer Boxhall Olivia Darnley as Bessie Allison Matt Devere as Boilerman Shane Attwooll as Billy Blake Ben Bishop as Stoker Lyons Jonathan Howard as Sixth Officer James Moody John Kazek as Steward Turnbull Gráinne Keenan as Laura Francatelli Tom Andrews as Seaman Hawkins Mike Kelly as Seaman Royce Alexis Latham as Man in Corridor Istvan Koncz as Gatti's Waiter Attila Bardóczy as Gatti's Waiter Iain McKee as Seaman Scott Szabolcs Thuróczy as Priest Colm Gormley as Winston Churchill Jamie MacPhee as Scots Guards Officer