The first manned expedition to Mars is invaded by an unknown life form, which stows away on the rescue ship.
Genre: Horror, Science Fiction Actors: Ann Doran, Dabbs Greer, Kim Spalding, Marshall Thompson, Paul Langton, Ray Corrigan, Richard Benedict, Richard Hervey, Robert Bice, Shirley Patterson, Thom Carney Directors: Edward L. Cahn Production: Robert E. Kent Productions, United Artists
