- James McKechnie
- Spud Wilson
- Neville Mapp
- Stuffy Graves
- Vincent Holman
- Club Porter (1942)
- Roger Livesey
- Clive Candy
- David Hutcheson
- Hoppy
- Spencer Trevor
- Period Blimp
- Roland Culver
- Colonel Betteridge
- James Knight
- Club Porter (1902)
- Deborah Kerr
- Edith Hunter / Barbara Wynne / Angela 'Johnny' Cannon
- Dennis Arundell
- Café Orchestra Leader
- David Ward
- Kaunitz
- Jan Van Loewen
- Indignant Citizen
- Valentine Dyall
- von Schönborn
- Carl Jaffe
- von Reumann
- Albert Lieven
- von Ritter
- Eric Maturin
- Colonel Goodhead
- Frith Banbury
- Baby-Face Fitzroy
- Robert Harris
- Embassy Secretary
- Arthur Wontner
- Embassy Counsellor
- Theodore Zichy
- Colonel Borg
- Anton Walbrook
- Theo Kretschmar-Schuldorff
- Jane Millican
- Nurse Erna
- Ursula Jeans
- Frau von Kalteneck
- Phyllis Morris
- Pebble
- Muriel Aked
- Aunt Margaret
- John Laurie
- Murdoch
- Reginald Tate
- van Zijl
- W.H. Barrett
- The Texan
- Thomas Palmer
- The Sergeant
- Yvonne Andre
- The Nun
- Marjorie Gresley
- The Matron
- Felix Aylmer
- The Bishop
- Helen Debroy Summers
- Mrs. Wynne
- Norman Pierce
- Mr. Wynne
- Harry Welchman
- Major Davies
- A.E. Matthews
- President of Tribunal
- Edward Cooper
- B.B.C. Official
- Joan Swinstead
- Secretary
- John Adams
- German Officer
- John Boxer
- Soldier
- Robin Burns
- Popeye
- Erik
- Cocker Spaniel (1920)
- Eileen Farrell
- Nun / nurse (uncredited)
- Ian Fleming
- Maj. Plumley (1902)
- Desmond Jeans
- Barman
- Patrick Macnee
- Extra
- Diana Marshall
- Sybil Hopwell
- Ferdy Mayne
- Prussian Student
- Pat McGrath
- Cpl. Tommy Tucker
- Ronald Millar
- Sgt Hawkins
- Charles Mortimer
- Dr. Crowler at Duel
- Pete Murray
- Extra in Crowd at BBC Bunker
- Peter Noble
- Prisoner of War
- Wally Patch
- Sergeant Clearing Debris
- Norris Smith
- Napoleon Armstrong (1918)
- Spangle
- Cocker Spaniel (1920)
- Patricia Tidy
- Edith's Sister
- Robert Brooks Turner
- Senior Service Officer at Dinner Party
- John Varley
- Soldier
- Norman Williams
- Youngster
- George Woodbridge
- Man with Debris Clearing Unit