An expedition to the lunar ice caves contracts a deadly moon-fungus. Stopping en route they contaminate a space station with the fungus, which soon begins to take over the entire place.
| Actor | Role |
|---|---|
 William LeslieMaj. Gordon Towers | Maj. Gordon Towers |
 Dolores FaithFaith Montaine | Faith Montaine |
 Richard GarlandCol. Frank Cromwell | Col. Frank Cromwell |
| JJames DobsonDr. Hoffman | Dr. Hoffman |
 Pamela CurranLt. Connie Engstrom | Lt. Connie Engstrom |
 Glenn LanganGen. Knowland | Gen. Knowland |
| BBoyd HolisterMaj. Olsen | Maj. Olsen |
 Harold Lloyd Jr.Sgt. Andrews | Sgt. Andrews |
| RRon StokesSgt. Sloan | Sgt. Sloan |
 Francine YorkCapt. Stevens | Capt. Stevens |
| GGabriel CurtizDr. Stoddard | Dr. Stoddard |
| CCarl CrowCapt. Don Webber | Capt. Don Webber |
| HH. Kay StephensSgt. Engstrom | Sgt. Engstrom |
| JJoel SmithNot listed | Not listed |
| RRobert NashNot listed | Not listed |