Cast & Crew
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Jack PalanceRonald Wyatt - Burgess MeredithDr. Diabolo
- Beverly AdamsCarla Hayes
- Peter CushingLancelot Canning
- Barbara EwingDorothy Endicott
- Michael BryantColin Williams
- Maurice DenhamActor
- John StandingLeo Winston
- Robert HuttonBruce Benton
- John PhillipsEddie Storm
- Michael RipperGordon Roberts
- Bernard KayDr. Heim
- Catherine FinnNurse Parker
- Ursula HowellsMiss Maxine
- Niall MacGinnisDr. Silversmith
- Timothy BatesonActor
- David BauerMike Charles
- Nicole ShelbyMillie
- Clytie JessopAtropos
- Michael HawkinsConstable
- Hedger WallaceActor
- Frank ForsythActor
- Roy StevensConstable
- Geoffrey WallaceActor
- James CopelandFred
- Norman ClaridgePolice Sergeant
- Roy GoldfreyCollector
- Barry LowTramp
- Fred FrancisDirector
- Max RosenbergProducer
- Milton SubotskyProducer