2 films match Lifeforce

A space shuttle mission investigating Halley's Comet brings back a malevolent race of space vampires who transform most of London's population into zombies. (imdb)

After a failed mission CIA agent Jessica Saunders gets a new order to watch Dr. MacLean by working for him as a programmer. When she arrives at his laboratory she is amazed about his experiments: Dr. MacLean has developed a computer who is able to view the dreams of sleeping people. But that is only the beginning of his plans. (imdb)