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