The film begins in a WW II training depot of a British Guards armoured regiment where recruits from many walks of life learn to survive the strict discipline and training together before going into battle in tanks. There is a cameo appearance by the real Sgt. Major Brittain who was famous in the British guards regiments.

• J. Arthur Rank Organisation
• Edward Underdown
• Ralph Clanton
• Helen Cherry
• Stella Andrew
• Michael Brennan
• Michael Trubshawe
• Rupert Gerard
• Desmond Llewelyn