Guest Stars Ralph Ineson as Steward Hart Miles Richardson as John Jacob Astor IV Diana Kent as Eleanor Widener Larina Mészáros as Loraine Allison Péter Kõszegi as George Widener Angéla Eke as Madeleine Astor Cian Barry as Fourth Officer Boxhall Olivia Darnley as Bessie Allison Lloyd Hutchinson as Chief Steward Lattimer Simon Paisley Day as Sir Cosmo Duff-Gordon Ifan Meredith as Fifth Officer Lowe Georgia McCutcheon as Theresa Maloney Jonathan Howard as Sixth Officer James Moody Ben Bishop as Stoker Lyons Tom Andrews as Seaman Hawkins Joseph May as Giglio Sally Bankes as Mrs. Gibson Gráinne Keenan as Laura Francatelli Sophie Rundle as Roberta Maioni Ryan Hawley as Jack Thayer Christine Kavanagh as Marian Thayer Will Keen as Chief Officer Wilde Joséphine De La Baume as Madame Aubart Laurie Hagen as Emma Sagesser Pandora Colin as Countess of Rothes Thomas Aldridge as Steward Taylor Istvan Koncz as Gatti's Waiter Attila Bardóczy as Gatti's Waiter Luke Norris as Seaman Holmes Richard Southgate as Youth with Jack Lili Horvath as Woman 1 in Lifeboat Margaréta Szabó as Woman 2 in Lifeboat Dave Legeno as Seaman Davis