The Invisible Ray ()

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A scientist becomes murderous after discovering, and being exposed to the radiation of, a powerful new element called Radium X.


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Cast verified as complete

Dr. Janos Rukh (as Karloff)
Dr. Felix Benet
Diana Rukh
Ronald Drake
Mother Rukh
Sir Francis Stevens
Lady Arabella Stevens
Professor Meiklejohn (Mendelssohn in end credits)
Paul Weigel ...
Monsieur Noyer
Georges Renavent ...
Chief of the Surete (as Georges Renevant)
Rest of cast listed alphabetically:
Bystander (uncredited)
Charles Bastin ...
French Newsboy (uncredited)
Mme. LeGrand (uncredited)
Ted Billings ...
Counterman (uncredited)
Ernest A. Bouveron ...
French Newsboy (uncredited)
Helen Brown ...
Blind Girl's Mother (uncredited)
Infant's Mother (uncredited)
André Cheron ...
Surete Official Checking Names (uncredited)
Alex Chivra ...
Cook (uncredited)
Ann Marie Conte ...
Blind Girl (uncredited)
Scientist (uncredited)
Gendarme (uncredited)
Safari Member (uncredited)
Charles Fallon ...
Gentleman (uncredited)
Constant Franke ...
Police Detective (uncredited)
Clarence Gordon ...
Porter / Servant (uncredited)
Robert Graves ...
Gendarme (uncredited)
Minister (uncredited)
Daniel L. Haynes ...
Rukh's Head Bearer (uncredited)
Isabel La Mal ...
Bystander (uncredited)
Alphonse Martell ...
Surete Official Checking Names (uncredited)
Francisco Marán ...
Gendarme (uncredited)
Paul McAllister ...
Papa LaCosta (uncredited)
Diane's Safari Attendant (uncredited)
Derelict (uncredited)
Edward Reinach ...
Scientist (uncredited)
Clinic Valet (uncredited)
Celeste (uncredited)
Adele St. Mauer ...
Mme. Noyer (uncredited)
Lawrence Stewart ...
Runner-boy (uncredited)
Native First Seeing Rukh Glow (uncredited)
Bearer with Geiger-Counter (uncredited)
Lucio Villegas ...
Pierre (uncredited)
Briggs (uncredited)
Lloyd Whitlock ...
Scientist (uncredited)

Directed by

Lambert Hillyer

Written by

John Colton ... (screenplay)
Howard Higgin ... (original story) &
Douglas Hodges ... (original story)

Produced by

Edmund Grainger ... producer (uncredited)
Fred S. Meyer ... executive producer (uncredited)

Music by

Franz Waxman ... (musical score)

Cinematography by

George Robinson

Film Editing by

Bernard W. Burton ... (as Bernard Burton)

Editorial Department

Maurice Pivar ... editorial supervisor (uncredited)

Art Direction by

Albert S. D'Agostino

Costume Design by

Brymer ... (gowns)

Makeup Department

Otto Lederer ... makeup artist (uncredited)
Jack P. Pierce ... makeup artist (uncredited)

Second Unit Director or Assistant Director

Fred Frank ... assistant director (uncredited)
Sergei Petschnikoff ... assistant director (uncredited)

Sound Department

Gilbert Kurland ... sound supervisor
Charles Carroll ... sound recordist (uncredited)
William Hedgcock ... sound recordist (uncredited)

Special Effects by

Raymond Lindsay ... special effects (uncredited)

Visual Effects by

John P. Fulton ... special cinematographer
Cleo E. Baker ... miniatures (uncredited)
Jack Cosgrove ... matte artist (uncredited)
David S. Horsley ... effects assistant (uncredited)
Russell Lawson ... matte artist (uncredited)

Music Department

C. Bakaleinikoff ... conductor (uncredited)
W. Franke Harling ... composer: stock music (uncredited)
Clifford Vaughan ... orchestrator (uncredited)
Franz Waxman ... composer: stock music (uncredited) / musical director (uncredited)

Other crew

Carl Laemmle ... presenter / president: Universal Productions, Inc.
Alfred Stern ... production assistant
Ted Behr ... technical advisor (uncredited)
June Blumenthal ... secretary to director (uncredited)
Camille Collins ... production secretary (uncredited)
Myrtle Gibsone ... script clerk (uncredited)
Crew believed to be complete

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Special Effects


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Plot Summary

Visionary scientist Janos Rukh convinces a group of scientists and supporters to mount an expedition to the African continent to locate and study an ancient meteorite of great significance. He exposes himself to the highly toxic radiation of the meteorite, and while an antidote devised by Dr. Benet saves him from death by radiation poisoning, his naked touch causes instant death to others. Back in London, the benefits of the meteorite's controlled radiation offer Dr. Benet an opportunity to restore eyesight to the blind. The antidote's toxicity excites Prof. Rukh into paranoid rages as he seeks revenge against the members of his expedition, who he accuses of stealing his discovery for their own glory. Written by Sister Grimm

Plot Keywords
Taglines Delving into new, strange fields of mystery! See more »
Parents Guide View content advisory »

Additional Details

Also Known As
  • Le rayon invisible (France)
  • Tödliche Strahlen (Germany)
  • El poder invisible (Spain)
  • Tödliche Strahlen (West Germany)
  • O Poder Invisível (Brazil)
  • See more »
  • 80 min
Aspect Ratio
Sound Mix
Filming Locations

Did You Know?

Trivia In 1986 actress Frances Drake recalled that the crew played a joke on star Karloff. They raised him up on a platform that was intended to lower him down into the radium pit. They raised him up high over the pit and left him there when they broke for lunch. According to Drake, the actor was a good sport about it. See more »
Goofs The film shows a clipping from a news magazine announcing that the principal characters have gone on an expedition to Nigeria to find the meteor containing Radium X. Yet in the earlier sequence showing the meteor landing on earth, it hit on the southwest coast of Africa over 1,000 miles away from Nigeria. See more »
Movie Connections Edited into Mondo Lugosi - A Vampire's Scrapbook (1987). See more »
Soundtracks Bridal Chorus (Here Comes the Bride) See more »
Crazy Credits At the end: "A Universal Cast is Worth Repeating." This credit appeared on many Universal films of that era, not just "The Invisible Ray". It did not, however, appear on the cast list for the 1936 "Show Boat", which Universal also made. See more »
Quotes Dr. Felix Benet: There are only two people he wants to destroy: two... or
[looming over Ronald Drake]
Dr. Felix Benet: , perhaps three.
See more »

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