| 角色 | 饰演者 | 角色介绍 |
| David Randall | Richard Derr | |
| Joyce Hendron | 芭芭拉·拉什 | |
| Dr. Tony Drake M.D. | Peter Hansen | |
| Sydney Stanton (millionaire) | 约翰·霍伊特 | |
| Dr. Cole Hendron Astronomer at Cosmos Observatory | Larry Keating | |
| Julie Cummings (as Judith Ames) | Rachel Ames | |
| Dr. George Frye Dean of Eastern School of Technology (as Stephen Chase) | Alden 'Stephen' Chase | |
| Harold Ferris Stanton's Assistant | Frank Cady | |
| Dr. Emery Bronson | Hayden Rorke | |
| Dr. Ottinger Astronomer | Sandro Giglio | |
| Rioter Bringing Guns (uncredited) | 柯克·阿林 | |
| Traveler (uncredited) | 格特鲁德·阿斯特 | |
| Student (uncredited) | Robert Chapman | |
| Newsdealer (uncredited) | Gene Collins | |
| Eddie Garson (uncredited) | James Congdon | |
| Headwaiter (uncredited) | Marcel De la Brosse | |
| Traveler (uncredited) | Estelle Etterre | |
| Complaining Man at Airport (uncredited) | Sam Finn | |
| Narrator/U.S. President (voice) (uncredited) | Paul Frees | |
| Paul Dr. Bronson's Assistant (uncredited) | Art Gilmore | |
| Student (uncredited) | Charmienne Harker | |
| French U.N. Respresentative (uncredited) | Ramsay Hill | |
| Student (uncredited) | Walter Kelley |
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