To avenge his father's death and free the people of Seriphos from the evil King Galinor of Argus, the noble Perseus must defeat a dragon -- and the monster Medusa, whose steely gaze has cast the kingdom's best soldiers into stone.
| Actor | Role |
|---|---|
 Richard HarrisonPerseo | Perseo |
 Ángel JordánMedusa | Medusa |
| AAnna RanalliAndromeda | Andromeda |
 Arturo DominiciAkrisios | Akrisios |
 Riccardo Cucciolla(Voice dubbing for Richard Harrison) | (Voice dubbing for Richard Harrison) |
 José SepúlvedaCefeo's counsellor | Cefeo's counsellor |
 Lorenzo RobledoPrince | Prince |
| ÁÁngela PlaEuryale | Euryale |
 Enrique NavarroStheno | Stheno |
 Rufino InglésNot listed | Not listed |
| JJose Luis FerreiroNot listed | Not listed |
| MMiguel de la RivaPrince | Prince |
| RRafael CortésSerifo nobleman | Serifo nobleman |
 Frank BrañaPrince | Prince |
 Elisa CeganiDanae | Danae |
 Bruno ScipioniNot listed | Not listed |
| FFernando LigerNot listed | Not listed |
| Ángel JordánAlceo | Alceo |
 Roberto CamardielCefeo | Cefeo |
 Antonio Molino RojoTarpete | Tarpete |
 Leo AnchórizGalenore | Galenore |
| Arturo DominiciAcrisio | Acrisio |