Cast
Desmond Roberts
2nd Club Member
Kenneth More
Bomb Aimer (uncredited)
Raymond Huntley
Prof. Laxton-Jones
Patrick Waddington
Group Capt. Aspinall
Murray Matheson
Wing Cdr. Allen
Hugh Pryse
Sir Nicholas Hathaway
David Hutcheson
Squadron Leader Sowerby
Marjorie Rhodes
Mrs. Arnold
Ralph Richardson
Prof. Heatherville
O.B. Clarence
Old Retainer
Arthur Mullard
(uncredited)
Pamela Matthews
Mrs. Watlington
Richard Attenborough
Jack Arnold
Robert Wyndham
Major
Bill Owen
Paratroop Sergeant (as Bill Rowbotham)
John Laurie
Dr. McVitie
Joan Young
Mrs. McVitie
Vida Hope
WAAF Flight Sergeant
Finlay Currie
Sir Duncan Wills
Paul Carpenter
Flt. Lt. Argylle
Aubrey Mallalieu
1st Club Member
Anthony Dawson
Flt. Lt. Norton
David Tomlinson
Mr. Watlington
Michael Hordern
Lt. Cmdr. Lowther
Cyril Smith
Flight Sgt. Cox
James Hayter
Warrant Officer
Robin Bailey
Wives' Escort Officer
Peggy Evans
Daphne Adams