| Richard Derr | David Randall |
| Barbara Rush | Joyce Hendron |
| Peter Hansen | Dr. Tony Drake M.D. |
| John Hoyt | Sydney Stanton |
| Larry Keating | Dr. Cole Hendron, Astronomer at Cosmos Observatory |
| Rachel Ames | Julie Cummings |
| Alden 'Stephen' Chase | Dr. George Frye, Dean of Eastern School of Technology |
| Frank Cady | Harold Ferris, Stanton's Assistant |
| Hayden Rorke | Dr. Emery Bronson |
| Sandro Giglio | Dr. Ottinger, Astronomer |
| Director | Rudolph Maté; Rudoplh Mate |
| Producer | George Pal; Cecil B. DeMille |
| Writer | Edwin Balmer; Sydney Boehm |
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