Hal Moffet AKA 'The Creeper'

Rondo Hatton

Clifford Scott

Tom Neal

Helen Paige

Jane Adams

Virginia Rogers Scott

Jan Wiley

Police Captain M. J. Donelly

Donald MacBride

Hal Moffat in his Youth

Fred Coby

Police Lieutenant Gates

Peter Whitney

Joan Bemis

Ja Nelle Johnson

Professor Cushman (uncredited)

John Hamilton

Joan Bemis (as JaNelle Johnson)

Janelle Johnson Dolenz

Mary Ann Obringer (uncredited)

Mary Ann Bricker

Police Lieutenant / voice of radio announcer (uncredited)

Tristram Coffin

Police Commissioner Salisbury (uncredited)

Joseph Crehan

Policeman at Helen's Apartment (uncredited)

Frank O'Connor

Nurse (uncredited)

Beatrice Roberts

Pawnbroker (uncredited)

Charles Wagenheim

Policeman at Helen's Apartment (uncredited)

William Ruhl

Police Dispatcher (uncredited)

James Nolan

Mr. Haskins - Grocer (uncredited)

Oscar O'Shea

Detective at Helen's Apartment (uncredited)

Patrick McVey

Jeweler (uncredited)

Warren Jackson