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