Անտեսանելի ճառագայթ

Boris Karloff Dr. Janos Rukh

Բելա Լուգոշի 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)