The Sphinx

Lionel Atwill

Jerome Breen

Sheila Terry

Jerry Crane

Theodore Newton

Jack Burton

Paul Hurst

Detective Terrence Aloysius Hogan

Luis Alberni

Luigi Baccigalupi

Robert Ellis

Inspector James Riley

Lucien Prival

Jenks, the Butler

Lillian Leighton

Mother Werner

Paul Fix

Dave Werner

George 'Gabby' Hayes

Detective Casey

Theodore Lorch

Dr. Augustus Kelton

Wilfred Lucas

Prosecuting Attorney

Hooper Atchley

Oliver P. Curran

Doane Harrison

Editor

Albert DeMond

Writer

Albert S. Rogell

Producer

Phil Rosen

Director

Gilbert Warrenton

Director of Photography