![]() | An "unknown force" declares war against planet Earth when the United Nations disobeys warnings to cease and desist in its attempts at assembling the first satellite in the atmosphere. |
| Dick Miller | - | Dave Boyer |
| Susan Cabot | - | Sybil Carrington |
| Richard Devon | - | Dr. Pol Van Ponder |
| Eric Sinclair | - | Dr. Howard Lazar |
| Michael Fox | - | Jason ibn Akad |
| Robert Shayne | - | Cole Hotchkiss |
| Jered Barclay | - | John Compo |
| John Brinkley | - | Crew Member |