Stephen Dillane
Edward Wood, 3rd Viscount Halifax
Nicholas Jones
John Simon, 1st Viscount Simon
Richard Lumsden
Major-General Hastings Ismay
Malcolm Storry
General Sir Edmund Ironside
Adrian Rawlins
Air Chief Marshal Sir Hugh Dowding
David Bamber
Vice-Admiral Bertram Ramsay
David Strathairn
Franklin D. Roosevelt (voix)
Jeremy Child
James Stanhope, 7th Earl Stanhope
Michael Gould
Charles Vane-Tempest-Stewart, 7th Marquess of Londonderry
James Harkness
AD Nicholl (Secretary #1)
Joshua James
W D Wilkinson (Secretary #2)
Adolf Hitler
Self (archives) (non-crédité)