A spaceship crew isolated in space with an alien aboard. A huge lizard man (Ray "Crash" Corrigan) rips through metal hatches and stalks the crew. Horrifying and claustrophobic with Marshall Thompson. Watch out! Watch Out...in the air ducts...there IT is! Multiple audio commentaries that include Tom Weaver, Bob Burns, Larry Blamire, David Schecter...plus a featurette on the film, and trailer.