http://imdb.com/title/tt0051786/

It! The Terror from Beyond Space (1958)
6.1/10 Updated : 2015-09-06
Rating: 5.7/10
[fresh!] 69% [audience liked it!] 44%
Horror , Sci-Fi
Marshall Thompson , Shirley Patterson , Kim Spalding , Ann Doran , Dabbs Greer , Paul Langton , Robert Bice , Richard Benedict , Richard Hervey ,
Thom Carney , Ray Corrigan
Edward L. Cahn
69
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...