
In 1840s London, Dr. Thomas Bolton [Boris Karloff] dares to dream the unthinkable: experimenting with anesthesia gases to make surgery pain-free. While doing so, his demonstration before a panel of his peers ends in a horrific mishap with his patient awakening under the knife; he is forced to leave his position in disgrace. To complicate matters, he becomes addicted to his own chemical experiments and gets involved with a criminal gang led by Black Ben [Francis de Wolff], and a ruthless killer Resurrection Joe [Christopher Lee]. Unfortunately, this shady partnership leads Dr. Bolton to further ruin, culminating in his unwitting participation in murder — for which he becomes the first victim of a blackmail scheme.

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

The Fugitive
The Fugitive

Article 99
Article 99

Psychic Wars
Psychic Wars

Black Jack: The Movie
Black Jack: The Movie

Kerosene Salesman's Wife
Kerosene Salesman's Wife

Perfectionist
Perfectionist

The Price We Pay
The Price We Pay

Gang Related
Gang Related

Do No Harm
Do No Harm

Mad Love
Mad Love

The Unbearable Lightness of Being
The Unbearable Lightness of Being

Hangmen Also Die!
Hangmen Also Die!