A fungus dubbed "Blood Rust" from outer space threatens to destroy the Earth.
| Actor | Role |
|---|---|
 Bill WilliamsJohn Hand | John Hand |
 Lyn ThomasLaura Greeling | Laura Greeling |
 Robert EllisPvt. Joe Rattigan | Pvt. Joe Rattigan |
 Paul FreesDr. Charles T. Pommer | Dr. Charles T. Pommer |
 Rhoda WilliamsStewardess Archer | Stewardess Archer |
 Joan BarryJean Meyers | Jean Meyers |
 Carol VargaElaine Frohman | Elaine Frohman |
 Thomas Browne HenryProf. West | Prof. West |
| TThomas WildeCollins | Collins |
| FFred ShermanMr. Morse | Mr. Morse |
 Gregg MartellJim Dale | Jim Dale |
| JJess KirkpatrickPilot Viccarino | Pilot Viccarino |
| CCourt ShepardHendry | Hendry |
 Moe HowardRetlinger | Retlinger |
 Edward BerndsTelevision News Announcer | Television News Announcer |