As might be ascertained from the title of the Colin Wilson novel on which it's based The Space Vampires , the film casts May as an undead alien who comes to Earth to feed on the life energy of human beings, and makes her job that bit easier by taking the form of a beautiful young woman with a severe aversion to clothing.
The infamously ludicrous Cannon Films sci-fi horror epic pretty much put the last nail in the coffin of the once-esteemed director Tobe Hooper's mainstream career.
While she's only on screen maybe 20 minutes, and the film is bursting with all manner of lavish special effects and histrionic performances, Mathilda May's scenes are the principle thing that keep Lifeforce memorable more than 30 years on.
And Patrick Stewart is in it.
The Tit and the Moon 1994.
A naked girl is not going to get out of this complex.
She begins to walk down another set of stairs before stopping and showing more complete nudity as she zaps a couple more guards out of her way.
Lastly, she breaks window and walks out into the night.