It! The Terror from Beyond Space (1958)

In 1973, the first manned expedition to Mars is marooned; by the time a rescue mission arrives, there is only one survivor: the leader, Col. Edward Carruthers, who appears to have murdered the others! According to Carruthers, an unknown life form killed his comrades during a sandstorm. But the skeptical rescuers little suspect that “it” has stowed away for the voyage back to Earth…
Edward L. Cahn, Ralph E. Black
Marshall Thompson, Shirley Patterson, Kim Spalding, Ann Doran, Dabbs Greer, Paul Langton, Robert Bice, Richard Benedict, Richard Hervey, Thom Carney, Ray Corrigan
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