Hercules (Gordon Scott) sets out to save the city of Troy from a horrible sea monster. Meanwhile, the city is threatened by a different kind of monster--a smarmy politician who will stop at nothing to seize the throne.
| Actor | Role |
|---|---|
 Gordon ScottHercules | Hercules |
 Paul StevensDiogenes | Diogenes |
| MMart HulswitUlysses | Ulysses |
 Diana HylandPrincess Diana | Princess Diana |
| SSteve GarrettPetra | Petra |
 Gordon MitchellPirate Captain | Pirate Captain |
 George ArdissonLeander | Leander |
 Roger BrowneOrtag | Ortag |
 Jacques StanyArgus | Argus |
 Mario NovelliBotus | Botus |
| DDan ChristianBoatswain | Boatswain |
 Everett SloaneNarrator (voice) | Narrator (voice) |