Winston Churchill
Clemmie Churchill
Desmond Morton
Ralph Wigram
Ava Wigram
Stanley Baldwin
David Inches
Sir Robert Vansittart
Violet Pearman
Ivo Pettifer
Friedrich von Schroder
Brendan Bracken
Mr. Wood
Randolph Churchill
Marlborough (as Timothy Bentinck)
Mrs. Landemare
Sarah Churchill
Mary Churchill (as Emma Seigel)
Peggy
Diana Churchill
German Diplomat
Ethel
Charley Wigram
Lady Moyne
Lord Moyne
Terence Philip
Harry Whitbread
Marjorie
Vic Oliver
Guard
40's Cinema woman
Soldier (Dream Scene) (uncredited)
Marburian Officer (uncredited)
Club Doorman (uncredited)
Self (archive footage) (uncredited)
Junior Secretary (uncredited)
John Ferguson MP (uncredited)
Middle-Aged Man (uncredited)