The Invisible Ray backdrop
SCIENCE FICTION . 1936 . 1h 19m . 6.3/10

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
6.3/10
Rating
1h 19m
Runtime
1936
Year
Updated Feb 16, 2026
The Invisible Ray poster
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.

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Cast
Boris Karloff stars as Dr. Janos Rukh in The Invisible Ray.
Boris Karloff →
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.

DETAILS

Release
Status
Released
Runtime
79 min (1h 19m)
Country
Rating
6.3/10 (60 votes)

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
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