Boris Karloff

James Lee Wong

Marjorie Reynolds

Roberta 'Bobbie' Logan

Grant Withers

Capt. Bill Street

Charles Trowbridge

John T. Forbes

Frank Puglia

Harry 'Hardway' Lockett

Craig Reynolds

Frank Belden, Jr.

Lita Chevret

Tanya Serova

Harry Strang

Det. Ballard

Hooper Atchley

Frank Belden, Sr.

Jason Robards Sr.

Griswold

Richard Loo

Jeweler

Jack Kennedy

Mike

C.E. Anderson

Cap Anderson

Allan Cavan

Radio Station Owner

Tris Coffin

Hotel Desk Clerk

Nick Copeland

The Crank Informant

Pauline Drake

Bessie, Switchboard Operator

Harry Harvey

Radio Salesman

Elsa Janssen

Hotel Maid

I. Stanford Jolley

Soapy

Donald Kerr

The Drunk

Wilbur Mack

Police Medical Examiner

Bert Moorhouse

Card Player

James C. Morton

Policeman Clancy

Paul Scardon

Homer Lyons - Informant

Mr. Wong, Detective

The Mystery of Mr. Wong

Mr. Wong in Chinatown

The Fatal Hour

Doomed to Die

Phantom of Chinatown