Steve Railsback

Character: Col. Tom Carlsen

Peter Firth

Character: Col. Colin Caine

Frank Finlay

Character: Dr. Hans Fallada

Mathilda May

Character: Space Girl

Patrick Stewart

Character: Dr. Armstrong

Michael Gothard

Character: Dr. Bukovsky

Nicholas Ball

Character: Roger Derebridge

Aubrey Morris

Character: Sir Percy Heseltine

Nancy Paul

Character: Ellen Donaldson

John Hallam

Character: Lamson

John Keegan

Character: Guard

Bill Malin

Character: Second Vampire

Derek Benfield

Character: Physician

Jerome Willis

Character: Pathologist

John Woodnutt

Character: Metallurgist

John Forbes-Robertson

Character: The Minister

Peter Porteous

Character: Prime Minister

Katherine Schofield

Character: Prime Minister's Secretary

Owen Holder

Character: First Scientist

Jamie Roberts

Character: Rawlings

Russell Sommers

Character: Navigation Officer

Patrick Connor

Character: Fatherly Guard

Sidney Kean

Character: Brash Guard

Paul Cooper

Character: Second Guard

Chris Sullivan

Character: Kelly

Burnell Tucker

Character: N.A.S.A. Man

Chris Jagger

Character: First Vampire

John Larroquette

Character: Narrator (uncredited)

James Payne

Character: NASA Man (uncredited)