
Plot
Dr. Thomas Bolton fights for the use of anesthetic in surgery and uses himself as a guinea pig, but soon finds himself addicted.
Trailer
Cast

Boris Karloff
Dr. Thomas Bolton

Betta St. John
Susan

Christopher Lee
Resurrection Joe

Finlay Currie
Supt. Charles Matheson

Adrienne Corri
Rachel

Francis de Wolff
Black Ben

Francis Matthews
Jonathan Bolton

Frank Pettingell
Mr. Blount

Basil Dignam
Hospital Chairman

Nigel Green
Insp. Donovan

Yvonne Romain
Rosa (as Yvonne Warren)

Howard Lang
Chief Inspector

Charles Lloyd Pack
Hardcastle

Bernard Archard
Hospital Official

Marianne Stone
Arrested Woman (uncredited)

Desmond Llewelyn
Operations Assistant (uncredited)

Skip Martin
(uncredited)