“Lifeforce,” directed by Tobe Hooper, is a science fiction horror film that begins with a space mission to investigate Halley’s Comet. The crew of the space shuttle Churchill discovers a massive alien spacecraft hidden in the comet’s tail. Inside, they find three humanoid aliens in suspended animation: two men and a woman. They bring the aliens back to Earth, but upon arrival, the aliens awaken and unleash a deadly force.

The female alien, played by Mathilda May, escapes and begins draining the lifeforce from humans, turning them into zombies who seek to consume others’ lifeforces to survive. Colonel Tom Carlsen (Steve Railsback), the sole survivor of the Churchill mission, returns to Earth and teams up with SAS Colonel Colin Caine (Peter Firth) to stop the alien threat.

As they investigate, they discover that the aliens are actually ancient space vampires who have visited Earth before and are responsible for legends of vampires throughout history. The female alien’s seductive powers and telepathic abilities make her a formidable foe, and Carlsen finds himself psychically connected to her.

The situation escalates when the infection spreads rapidly, leading to chaos in London. Carlsen and Caine race against time to locate and destroy the alien vampires before they can annihilate humanity. Their journey takes them deep into the heart of the chaos, culminating in a dramatic confrontation at St. Paul’s Cathedral.

“Lifeforce” combines elements of horror, science fiction, and apocalyptic thriller, with striking visual effects and a unique take on the vampire mythos. The film explores themes of survival, seduction, and the primal fears of life and death, delivering a gripping and suspenseful narrative that keeps viewers on the edge of their seats.