It! The Terror from Beyond Space aka It! The Vampire from Beyond Space (1958) revolves around a rescue mission to Mars that finds the sole survivor from the previous Earth expedition. The survivor, the expedition's former commander, claims his crew were hunted to death, one-by-one, by a hostile Martian life form. The rescue ship's captain doesn't believe him, thinking they were killed for their provisions so the commander could survive. He orders the commander confined to quarters as the rescue ship launches for Earth. The same hostile Martian creature, now on board, begins another killing spree.