A strange sphere settles down in a California canyon, causing both the scientific and military communities to gather around to investigate.
| Actor | Role |
|---|---|
 John CarradineCosmic Man | Cosmic Man |
 Bruce BennettDr. Karl Sorenson | Dr. Karl Sorenson |
 Angela GreeneKathy Grant | Kathy Grant |
 Paul LangtonCol. Matthews | Col. Matthews |
 Scotty MorrowKen Grant | Ken Grant |
| LLyn OsbornSgt. Gray | Sgt. Gray |
| WWalter MaslowDr. "Rich" Richie | Dr. "Rich" Richie |
 Herbert LyttonGen. Knowland | Gen. Knowland |
 Ken ClaytonMaster Sergeant | Master Sergeant |
| HHarry FleerBill, the Park Ranger | Bill, the Park Ranger |
 John ErmanRadar Operator | Radar Operator |
| DDwight BrooksMajor | Major |
| HHal ToreyDr. Steinholtz | Dr. Steinholtz |
| AAlan WellsSergeant | Sergeant |