Trailer
Images
 | Sal Ponti as Demetrios |
 | Joyce Taylor as Princess Antillia |
 | John Dall as Zaren |
 | William Smith as Captain of the Guard |
 | Edward Platt as Azor the High Priest |
 | Frank De Kova as Sonoy the Astrologer |
 | Berry Kroeger as Surgeon |
 | Edgar Stehli as King Kronas |
 | Wolfe Barzell as Petros, Demetrios' Father |
 | Jay Novello as Xandros the Greek Slave |
 | Paul Frees as Narrator / Multiple Voices (voice) |
 | Nestor Paiva as Megalos (uncredited) |
 | John Hart as Nobleman (uncredited) |
| Phyllis Douglas as Girl (uncredited) |
 | I. Stanford Jolley as Governor of Rivers (uncredited) |
 | Gene Roth as Governor of Animals (uncredited) |
 | Charles Horvath as Nobleman (uncredited) |
| Charles Cirillo as Slave (uncredited) |
| George Bruggeman as Guard (uncredited) |
| Robert 'Big Buck' Maffei as Andex the Giant (uncredited) |
 | Byron Morrow as Governor of the Mountains (uncredited) |
 | Will J. White as Officer (uncredited) |
| Ralph Smiley as Pavlo (uncredited) |
| Harry Fleer as Governor of Science (uncredited) |
| David Dyer as Priest (uncredited) |
| Alan Callow as Norseman Slave (uncredited) |
| Production | |
| George Pal | Producer |
Directing | |
| George Pal | Director |
Writing | |
| Daniel Mainwaring | Writer |
Crew | |
| Charles Horvath | Stunts |
| Roy Jenson | Stunts |
| Paul Baxley | Stunts |
Sound | |
| Russell Garcia | Original Music Composer |
Art | |
| William Ferrari | Art Direction |
Visual Effects | |
| Jim Danforth | Visual Effects |
Writing | |
| Gerald Hargreaves | Theatre Play |
Visual Effects | |
| Wah Chang | Visual Effects |
Crew | |
| Lee LeBlanc | Special Effects |
| Robert R. Hoag | Special Effects |
Editing | |
| Ben Lewis | Editor |
Visual Effects | |
| Gene Warren | Visual Effects |
Crew | |
| A. Arnold Gillespie | Special Effects |
Camera | |
| Harold E. Wellman | Director of Photography |
Art | |
| Richard Pefferle | Set Decoration |
| George W. Davis | Art Direction |
Costume & Make-Up | |
| William Tuttle | Makeup Artist |
| Mary Keats | Hairstylist |
Art | |
| Henry Grace | Set Decoration |
Costume & Make-Up | |
| John Truwe | Makeup Artist |
Sound | |
| Franklin Milton | Recording Supervision |
