Steve Railsback

Col. Tom Carlsen

Peter Firth

Col. Colin Caine

Frank Finlay

Dr. Hans Fallada

Mathilda May

Space Girl

Patrick Stewart

Dr. Armstrong

Michael Gothard

Dr. Bukovsky

Nicholas Ball

Roger Derebridge

Aubrey Morris

Sir Percy Heseltine

Nancy Paul

Ellen Donaldson

John Hallam

Lamson

Derek Benfield

Physician

Jerome Willis

Pathologist

John Woodnutt

Metallurgist

Peter Porteous

Prime Minister

Katherine Schofield

Prime Minister's Secretary

Burnell Tucker

N.A.S.A. Man

Chris Jagger

First Vampire

John Larroquette

Narrator (uncredited)