Mgm Drive In Theater #2 It Terror From Beyond Stars

"Re-tooled as a retro-1950s alien adventure, we join the spaceship Challenge 142 returning from a rescue mission to Mars. It carries the only survivor of an earlier failed expedition who is suspected of killing his crew for their lifesaving rations. Now, as they travel Earthbound they may be wrong about their prisoner, as something monstrous may have come on board the ship "