Näitlejad

• Kristin Scott Thomas — Clementine Churchill
• Stephen Dillane — Edward Wood, 3rd Viscount Halifax
• Nicholas Jones — John Simon, 1st Viscount Simon
• David Bamber — Vice-Admiral Bertram Ramsay
• David Strathairn — Franklin D. Roosevelt (voice)
• Philip Martin Brown — Sawyers
• Pip Torrens — BBC Producer
• Gary Oldman — Winston Churchill
• Lily James — Elizabeth Layton
• Ronald Pickup — Neville Chamberlain
• Ben Mendelsohn — George VI
• Samuel West — Anthony Eden
• David Schofield — Clement Atlee
• Richard Lumsden — Major-General Hastings Ismay
• Malcolm Storry — General Sir Edmund Ironside
• Hilton McRae — Arthur Greenwood
• Benjamin Whitrow — Sir Samuel Hoare
• Joe Armstrong — John Evans
• Adrian Rawlins — Air Chief Marshal Sir Hugh Dowding
• Jeremy Child — James Stanhope, 7th Earl Stanhope
• Brian Pettifer — Sir Kingsley Wood
• Michael Gould — Charles Vane-Tempest-Stewart, 7th Marquess of Londonderry
• Faye Marsay — Sybil
• Jordan Waller — Randolph Churchill
• Bethany Muir — Sarah Churchill
• Joanna Neary — Jerome Margaret
• Flora Nicholson — Jessie Sutton
• Richard Glover — Brigadier Nicholson
• Bronte Carmichael — Young Girl on Train
• Patsy Ferran — Maid
• John Locke — Oliver Wilson