When a couple are killed in an auto accident their bodies are immediately inhabited by extraterrestrial beings. Taking refuge in an underground cave, the aliens attempt to sabotage the U.S. space program.
| Actor | Role |
|---|---|
 Scott PetersTom Wright | Tom Wright |
| LLinda ConnellSally Markham | Sally Markham |
| JJason JohnsonHauron | Hauron |
 Katherine VictorNadja | Nadja |
| BBilly GreeneDr. Heinrich von Hofften | Dr. Heinrich von Hofften |
| CChuck HowardMaj. Gen. Hollister | Maj. Gen. Hollister |
| GGary TravisBob Harding | Bob Harding |
| TThelaine WilliamsShirley | Shirley |
| LLyle FelisseChief Deputy | Chief Deputy |
| BBrian F. WardElmer Wesson | Elmer Wesson |
| JJoe ChesterDr. Meister | Dr. Meister |
| FFlori Jo JohnsonPolice Dispatcher | Police Dispatcher |
| MMatt ShawDeputy Moss | Deputy Moss |
| BBill VessHollister's Aide | Hollister's Aide |
 David KingSecond Deputy | Second Deputy |
| HHarriet DichterWoman Scientist | Woman Scientist |
 Tony SolerNewsboy | Newsboy |
| TTom AllenCorporal Wilson | Corporal Wilson |