Lifeforce (1985)

"Lifeforce" is a 1985 sci-fi horror film about astronauts who discover a dormant alien aboard a derelict spacecraft and unwittingly carry it back to Earth, setting off chaos across London. Mathilda May plays the space vampire at the center of it all, spending nearly all her screen time completely naked as she stalks through the film with an unsettling calm. The site holds 1 scene from the film, covering her nude introduction in full.