Rondo Hatton

Hal Moffet AKA 'The Creeper'

Tom Neal

Clifford Scott

Jan Wiley

Virginia Rogers Scott

Jane Adams

Helen Paige

Donald MacBride

Police Captain M. J. Donelly

Peter Whitney

Police Lieutenant Gates

Fred Coby

Young Hal Moffet

Janelle Johnson Dolenz

Joan Bemis (as JaNelle Johnson)

Mary Ann Bricker

Mary Ann Obringer (uncredited)

Tristram Coffin

Police Lieutenant / voice of radio announcer (uncredited)

Joseph Crehan

Police Commissioner Salisbury (uncredited)

John Hamilton

Professor Cushman (uncredited)

Frank O'Connor

Policeman at Helen's Apartment (uncredited)

Beatrice Roberts

Nurse (uncredited)

Charles Wagenheim

Pawnbroker (uncredited)