Regia

• John Fitchen — director

Sceneggiatura

• Richard Griffith — story
• John Fitchen — screenplay

Montaggio

• Abel Goodman — editor

Produzione

• Patrick Young — producer

Troupe tecnica

• Charles Green — sound recordist
• Joe Noble — special effects

Fotografia

• S.D. Onions — director of photography
• Peter Hamilton — director of photography

Cast

• Christopher Lee — Harry Cooper
• Ferdy Mayne — Bernard J. Maskell
• Mercy Haystead — Betty
• Janet Richards — Susan Cooper
• Beryl Nesbitt — Mary Freeman