The Invisible Ray Characters

Characters played by Boris Karloff

• Dr. Janos Rukh

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Characters played by Bela Lugosi

• Dr. Felix Benet

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Characters played by Frances Drake

• Diana Rukh

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Characters played by Frank Lawton

• Ronald Drake

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Characters played by Violet Kemble Cooper

• Mother Rukh

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Characters played by Walter Kingsford

• Sir Francis Stevens

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Characters played by Beulah Bondi

• Lady Arabella Stevens

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Characters played by Frank Reicher

• Professor Meiklejohn (Mendelssohn in end credits)

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Characters played by Paul Weigel

• Monsieur Noyer

Characters played by Georges Renavent

• Chief of the Surete

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