Medverkande
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Edward JuddArnold Bedford - Martha HyerKatherine "Kate" Callender
- Lionel JeffriesJoseph Cavor
- Betty McDowallMargaret Hoy
- Miles MallesonRegistrar
- Gladys HensonNursing Home Matron
- Hugh McDermottRichard Challis
- Erik ChittyGibbs (uncredited)
- Gordon RobinsonSgt. Andrew Martin (uncredited)
- Laurence HerderGlushkov (uncredited)
- Marne MaitlandDr. Tok (uncredited)
- Ray HarryhausenRegissör
- Nathan H. JuranRegissör
- Charles H. SchneerProducent
- Ray HarryhausenProducent
- Nigel KnealeFörfattare
- H.G. WellsFörfattare