cast
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Ralph Richardson
Prof. Heatherville
-
Raymond Huntley
Prof. Laxton-Jones
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John Laurie
Dr. McVitie
- Ernest Jay Dr. Dainty
-
David Tomlinson
Mr. Watlington
-
Finlay Currie
Sir Duncan Wills
- Norman Webb Dr. Wainwright
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Michael Hordern
Lt. Cmdr. Lowther
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Pamela Matthews
Mrs. Watlington
- Joan Haythorne Mrs. Laxton-Jones
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Joan Young
Mrs. McVitie
- Ann Wilton Mrs. Dainty
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Richard Attenborough
Jack Arnold
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David Hutcheson
Squadron Leader Sowerby
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Patrick Waddington
Group Capt. Aspinall
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Cyril Smith
Flight Sgt. Cox
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James Hayter
Warrant Officer
- D. Bradley Smith Air Marshal Cotter
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Robin Bailey
Wives' Escort Officer
- Hugh Dempster Sqdn. Ldr. Slatter
- Kenneth Buckley Sqdn. Ldr. Buckley
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Paul Carpenter
Flt. Lt. Argylle
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Anthony Dawson
Flt. Lt. Norton
- Robert Long Flying Officer Davies
- Richard Mantell Air Vice-Marshal
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Murray Matheson
Wing Cdr. Allen
- Anthony Wyckham Flying Officer Ogden
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Peggy Evans
Daphne Adams
- Ingrid Forrest Penelope Birkenshaw
- Geraldine Keyes Phyllis Hammond
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Vida Hope
WAAF Flight Sergeant
- Sonia Elverson WAAF Teller
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Robert Wyndham
Major
- Andrew Blackett Captain
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Bill Owen
Paratroop Sergeant (as Bill Rowbotham)
- Tony Arpino 1st Commando
- Peter March 2nd Commando
- Bob Elson 3rd Commando
- Roger Keyes 4th Commando
- Trevening Hill 5th Commando
- Edward Hodge 6th Commando
- Joseph Almas Dr. Klemmerhahn
- Arthur Rieck Lt. Hense
- Ernest Urbank 1st Sentry
- Karl Morel 2nd Sentry
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Marjorie Rhodes
Mrs. Arnold
- Edward Lexy Sir Desmond Prosser
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Hugh Pryse
Sir Nicholas Hathaway
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O.B. Clarence
Old Retainer
-
Aubrey Mallalieu
1st Club Member
-
Desmond Roberts
2nd Club Member
- Guy Belmore 3rd Club Member
- Alvar Liddell BBC Announcer (voice)
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Kenneth More
Bomb Aimer (uncredited)
-
Arthur Mullard
(uncredited)
- Ian Selby Man at Dance (uncredited)