Calificación
Reparto

Guy Rolfe
Dr. Mark Fenton

Lisa Daniely
Lisa Durand

Patricia Dainton
Sister Rogers

Sydney Tafler
Wade

Ballard Berkeley
Inspector Austin

Anton Diffring
Edward Shroder

Brian Worth
Geoffrey Terry

Avice Landone
Mrs. Terry

Eric Berry
Col. Williams

James Raglan
Sir Oliver Peters

Alexis Chesnakov
Ship's Captain

Michael Golden
Harrison

Edward Dentith
Sergeant Lewis

William Franklyn
Dr. Gillespie

Desmond Llewelyn
Police Constable at Barrier