Where to Watch
Region
Apple TV Store
Rent from
HD
$3.99
Apple TV Store
Buy from
HD
$14.99
Amazon Video
Rent from
HD
$3.99
Amazon Video
Buy from
HD
$14.99
Fawesome
Watch free
HD
Included
See all 9 options →
Prices last updated September 11, 2026. Pricing and availability may vary by region.
powered by JustWatch
About
Dr. Janos Rukh discovers a certain type of radium that has almost magical healing properties. But the element has a dangerous side, too, and it has already started affecting Rukh. Consumed by paranoia, he begins to suspect that his wife is having an affair. Wild for revenge, Rukh hatches a deadly plot...using his own poisoned body as a weapon to kill.
Theatrical
Jan 20, 1936
Quotes
See all →Exploring the Mysteries of the Unknown
Taglines
Delving into new, strange fields of mystery!
Quotes sourced from Wikiquote (© Wikiquote contributors), licensed under CC BY-SA 4.0. Modified for formatting/length.
Consequences of an Unseen Force
Taglines
Destruction to all he touched or looked upon!
Quotes sourced from Wikiquote (© Wikiquote contributors), licensed under CC BY-SA 4.0. Modified for formatting/length.
Cast
Full credits →B
Boris Karloff
Dr. Janos Rukh
B
Bela Lugosi
Dr. Felix Benet
F
Frank Lawton
Ronald Drake
F
Frances Drake
Diana Rukh
V
Violet Kemble Cooper
Mother Rukh
B
Beulah Bondi
Lady Arabella Stevens
W
Walter Kingsford
Sir Francis Stevens
P
Paul Weigel
Monsieur Noyer
F
Frank Reicher
Professor Meiklejohn
G
Georges Renavent
Chief of the Surete
M
May Beatty
Mme. LeGrand (uncredited)
P
Paul McAllister
Papa LaCosta (uncredited)
N
Nydia Westman
Briggs (uncredited)
Y
Ynez Seabury
Celeste (uncredited)
R
Robert Graves
Gendarme (uncredited)
