"A space commander and a Scotland Yard inspector search for a naked space vampire loose in

No, I did not make that up. It's a movie. A movie you must see to believe. It's so awesomely bad, it may rank among the most awesomely bad movies of all time.
Two inexplicable things about this movie:
1. It was directed by the guy who directed Poltergeist – by most accounts, a very good film.
Lifeforce, on the other hand, looks very much like something Uwe Boll might have cooked up.
2. Patrick Stewart is in this movie. No shitting.