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.

• Golan-Globus Productions
• Easedram
• Steve Railsback
• Peter Firth
• Frank Finlay
• Mathilda May
• Patrick Stewart
• Michael Gothard
• Nicholas Ball
• Aubrey Morris