It the Terror From Beyond Space (1958)

An interplanetary ship rescues the sole survivor of a Martian scouting mission and heads for home, unaware that a bloodsucking creature has stowed away in the cargo hold and is slowly heading for the crew's quarters. Well-made sci-fi thriller that was the unofficial inspiration for "Alien" stars Marshall Thompson, Ann Doran, and Ray "Crash" Corrigan as "It." 70 min. Standard; Soundtrack: English; Subtitles: English; audio commentary; featurette; theatrical trailer.