It! Terror From Beyond Space. 1958.
A manned expedition to Mars is marooned on the planet, with one survivor the rescue ship picks up a creature that has stowed away.
This was a decent B movie that is impressive with a good written script and good acting, some films from the era drag on for the first 30 mins before all hell breaks loose but this seems to jump in quick. The Monster is seen offscreen in shadows until near the end. Edward Cahn done a decent job with the direction adding in a sense of claustrophobia tension.
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