 | John Agar als Dr. Roger Bentley |
 | Cynthia Patrick als Adad |
 | Hugh Beaumont als Dr. Jud Bellamin |
 | Alan Napier als Elinu, the High Priest |
 | Nestor Paiva als Prof. Etienne Lafarge |
 | Phil Chambers als Dr. Paul Stuart |
 | Rodd Redwing als Nazar |
 | Robin Hughes als First Officer |
 | Eddie Parker als Mole Person |
 | Frank Baxter als Self (as Dr. Frank C. Baxter) |
 | Robert F. Hoy als Mole Person |
 | Joe Abdullah |
| Yvonne de Lavallade |
| John Dodsworth |
| Arthur D. Gilmour |
| Marc Hamilton |
 | Bob Herron |
| Kay E. Kuter |
| James Logan |
| Billy Miller |
| Joe Rubino |
| Patrick Whyte |
| Virgil W. Vogel | Director |
| William Alland | Producer |
| Ellis W. Carter | Director of Photography |
| Irving Birnbaum | Editor |
| Bud Westmore | Makeup Artist |
| Joan St. Oegger | Hairstylist |
| Alexander Golitzen | Art Direction |
| Robert Emmet Smith | Art Direction |
| Jay A. Morley Jr. | Costume Design |
| Heinz Roemheld | Original Music Composer |
| Hans J. Salter | Original Music Composer |
| Herman Stein | Original Music Composer |
| László Görög | Screenplay |
| Russell A. Gausman | Set Decoration |
| Carl J. Lawrence | Set Decoration |
