Guest Stars Ralph Ineson as Steward Hart Miles Richardson as John Jacob Astor IV Diana Kent as Eleanor Widener Georgia McCutcheon as Theresa Maloney Ifan Meredith as Fifth Officer Lowe Simon Paisley Day as Sir Cosmo Duff-Gordon Lloyd Hutchinson as Chief Steward Lattimer Olivia Darnley as Bessie Allison Cian Barry as Fourth Officer Boxhall Angéla Eke as Madeleine Astor Péter Kõszegi as George Widener Larina Mészáros as Loraine Allison Shane Attwooll as Billy Blake Jonathan Howard as Sixth Officer James Moody Matt Devere as Boilerman Sally Bankes as Mrs. Gibson John Kazek as Steward Turnbull Gráinne Keenan as Laura Francatelli Tom Andrews as Seaman Hawkins Joseph May as Giglio Sophie Rundle as Roberta Maioni Ryan Hawley as Jack Thayer Christine Kavanagh as Marian Thayer Joséphine De La Baume as Madame Aubart Beatrice Zentai as Woman 1 at Purser's Eszter Zakariás as Woman 2 at Purser's Thomas Aldridge as Steward Taylor Pandora Colin as Countess of Rothes Laurie Hagen as Emma Sagesser Tim Downie as Policeman Geoffrey Thomas as American Valet Michele Moran as Prostitute Kevin Lukács as American Valet Csongor Veér as Band Leader Mátyás Ölveti as Cellist Izabella Urbanowicz as Alice Cleaver