Lifeforce Word Search Puzzle – Search Characters, Actors and Actresses. Word Search Puzzle Solver. 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. The only survivor of the expedition and British authorities attempt to capture a mysterious but beautiful alien woman who appears responsible. Find out the following actor, actress, character names, and other movie-related words hidden in this word search puzzle based on this movie.. This includes identifying and searching for words that are related to : Guard, Lamson, Physician, Space Girl, Nancy Paul, Bill Malin, John Keegan, John Hallam, Pathologist, Peter Firth, Mathilda May, Dr. Bukovsky, Chris Jagger, Frank Finlay, First Vampire .