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.
Steve Railsback
as Col. Tom Carlsen
Peter Firth
as Col. Colin Caine
Frank Finlay
as Dr. Hans Fallada
Mathilda May
as Space Girl
Patrick Stewart
as Dr. Armstrong
Michael Gothard
as Dr. Bukovsky
Nicholas Ball
as Roger Derebridge
Aubrey Morris
as Sir Percy Heseltine
Nancy Paul
as Ellen Donaldson
John Hallam
as Lamson
John Keegan
as Guard
Bill Malin
as Second Vampire
