Calificación
Reparto

Christopher Lee
Dr. Stephen Hayward

Jon Finch
Lomax

Judy Geeson
Helen

Dilys Hamlett
Julia Hayward

Tony Beckley
Sgt. Greene

Jane Merrow
Mary Dawson

Colin Jeavons
Bob Dawson

David Trevena
Johnson

Adrian Cairns
Morgan

Daphne Neville
Nurse Fisher

Hugh Smith-Marriott
Dr. Chapman

Hubert Tucker
Ronalds

David Langford
Gray