The Fatal Impulse

Boris Karloff

Self

Robert Lansing

Lieutenant Brian Rome

Whitney Blake

Jane Kimball

Conrad Nagel

Mayor Walker Wylie

Mary Tyler Moore

Mary Snyder

Elisha Cook Jr.

Harry Elser

Steve Brodie

Sgt. George Dumont

Elaine Edwards

Marjorie Dalquiss

Lance Fuller

Robert Larrimore

Harry Bartell

Mr. Dalquiss

Alice Backes

Carolyn

Antony Carbone

Bernie

Ed Nelson

Brundage

Cynthia Pepper

Receptionist

Ernestine Barrier

Agnes Kimball

Ella Ethridge

Martha Bailey

Fred Graham

Sgt. Hannigan

Edwin Rochelle

Waiter (uncredited)

Chalky Williams

Policeman (uncredited)