Dr. Thomas Bolton fights for the use of anesthetic in surgery and uses himself as a guinea pig, but soon finds himself addicted.
Boris Karloff
as Dr. Thomas Bolton
Betta St. John
as Susan
Christopher Lee
as Resurrection Joe
Finlay Currie
as Supt. Charles Matheson
Adrienne Corri
as Rachel
Francis de Wolff
as Black Ben
Francis Matthews
as Jonathan Bolton
Frank Pettingell
as Mr. Blount
Basil Dignam
as Hospital Chairman
Nigel Green
as Insp. Donovan
Yvonne Romain
as Rosa (as Yvonne Warren)
Howard Lang
as Chief Inspector
