Experiment Perilous

George Brent

Dr. Huntington Bailey

Hedy Lamarr

Allida Bederaux

Paul Lukas

Nicholas 'Nick' Bederaux

Albert Dekker

'Clag' Claghorn

Carl Esmond

John Maitland

Olive Blakeney

Clarissa 'Cissie' Bederaux

George N. Neise

Alec Gregory

Margaret Wycherly

Maggie, the Maid

Stephanie Bachelor

Elaine

Mary Servoss

Miss Wilson

Julia Dean

Deria

William Post Jr.

District Attorney

John Ardell

(uncredited)

Richard Bartell

Hospital Intern (uncredited)

Mary Benoit

(uncredited)

John Benson

(uncredited)