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
Tris 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)