The Invisible Ray_
"Delving into new, strange fields of mystery!"
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.
Starring
Boris Karloff, Bela Lugosi, Frank Lawton
Updated Feb 16, 2026
WHERE TO WATCH
DROPTHE_ GOSSIP
Year context
The Invisible Ray was released 90 years ago in 1936.
Overview
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 s...
The Invisible Ray is a Science Fiction, Horror, Thriller film with a runtime of 1h 19m.
CAST (15)
Boris Karloff
Dr. Janos Rukh
Bela Lugosi
Dr. Felix Benet
Frank Lawton
Ronald Drake
Frances Drake
Diana Rukh
Violet Kemble Cooper
Mother Rukh
Beulah Bondi
Lady Arabella Stevens
Walter Kingsford
Sir Francis Stevens
Paul Weigel
Monsieur Noyer
Frank Reicher
Professor Meiklejohn
Georges Renavent
Chief of the Surete
May Beatty
Mme. LeGrand (uncredited)
Paul McAllister
Papa LaCosta (uncredited)
Nydia Westman
Briggs (uncredited)
Ynez Seabury
Celeste (uncredited)
Robert Graves
Gendarme (uncredited)
DETAILS
FREQUENTLY ASKED QUESTIONS
What is The Invisible Ray 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.
How long is The Invisible Ray?
The Invisible Ray has a runtime of 79 minutes (1h 19m).
Who stars in The Invisible Ray?
The cast of The Invisible Ray includes Boris Karloff, Bela Lugosi, Frank Lawton, Frances Drake, Violet Kemble Cooper.
What is the rating of The Invisible Ray?
The Invisible Ray has a rating of 6.3 out of 10 based on 60 votes on TMDB.
GENRES (3)
Science Fiction
Horror
Thriller