Cast en crew
- Todd ArmstrongJason
-
Nancy KovackMedea - Gary RaymondAcastus
- Honor BlackmanHera
- Nigel GreenHercules
- Laurence NaismithArgus
- Niall MacGinnisZeus
- Michael GwynnHermes
- Douglas WilmerPelias
- Jack GwillimKing Aeetes
- John CairneyHylas
- Patrick TroughtonPhineas
- Andrew FauldsPhalerus
- Nando PoggiCastor (uncredited)
- John CrawfordPolydeuces (uncredited)
- Doug RobinsonEupaemus (uncredited)
- Don ChaffeyRegisseur
- Charles H. SchneerProducent
- Ray HarryhausenProducent
- Jan ReadSchrijver
- Beverley CrossSchrijver
- Bernard HerrmannMuziek