The first manned spacecraft, fired from an English launchpad, is first lost from radar, then roars back to Earth and crashes in a farmer's field, and is found to contain only one of the three men who took off in it; and he is unable to talk but appears to be undergoing a torturous physical and mental metamorphosis.

• Hammer Film Productions
• Exclusive Films
• Brian Donlevy
• Jack Warner
• Richard Wordsworth
• Margia Dean
• Thora Hird
• Gordon Jackson
• David King-Wood
• Harold Lang