- Producer:
- Roy Boulting
- Screenplay/Director:
- John Boulting
- Screenplay:
- Frank Harvey
- From the story by:
- Alan Hackney
- Cox:
- Richard Attenborough
- Bertram Tracepurcel:
- Dennis Price
- Major Hitchcock:
- Terry Thomas
- Stanley Windrush:
- Ian Carmichael
- Egan:
- Peter Jones
- Sgt. Sutton:
- William Hartnell
- Capt. Bootle:
- Thorley Waters
- Prudence Greenslade:
- Jill Adams
- Private Horrocks:
- Ian Bannen
- Private George Blake:
- Victor Maddern
- Private Dai Jones:
- Kenneth Griffith
- Sgt.-Major Gradwick:
- John Warren
- Padre:
- George Coulouris
- Pat:
- Derrick de Marney
- Gerald:
- David King-Wood
- Windrush Senior:
- Miles Malleson
- Col. Panshawe:
- Michael Trubshawe
- L/Cpl. Parsons:
- David Lodge
- Psychiatrist:
- John Le Mesurier
- Drill Sergeant:
- Frank Hawkins
- Col. Argent:
- Basil Dignam
- Mr. Spottiswood:
- Henry Longhurst
- First art expert:
- Henry Oscar
- German agent:
- Theodore Zichy
- Sidney:
- Michael Ward
- Testing Officer:
- Robert Bruce
- General Von Lembeck:
- Ludwig Lawinski
- Major Schultz:
- Christopher Lee
