Edward Wood, 3rd Viscount Halifax
John Simon, 1st Viscount Simon
Major-General Hastings Ismay
General Sir Edmund Ironside
Air Chief Marshal Sir Hugh Dowding
Vice-Admiral Bertram Ramsay
Franklin D. Roosevelt (voice)
James Stanhope, 7th Earl Stanhope
Charles Vane-Tempest-Stewart, 7th Marquess of Londonderry
AD Nicholl (Secretary #1)
W D Wilkinson (Secretary #2)
Self (archive footage) (uncredited)