Sidney Toler

Charlie Chan

Victor Sen Yung

Jimmy Chan (as Sen Yung)

C. Henry Gordon

Dr. Cream

Marc Lawrence

Steve McBirney

Eddie Marr

Henchman Grenock

Charles Wagenheim

Willie Fern, museum watchman

Joan Valerie

Lily Latimer

Marguerite Chapman

Mary Bolton

Hilda Vaughn

Mrs. Joe Rocke

Harold Goodwin

Edwards, radio sound man

Ted Osborne

Tom Agnew (as Ted Osborn)

Archie Twitchell

Carter Lane

Michael Visaroff

Dr. Otto Von Brom

Joe King

Inspector O'Matthews

Charles Trowbridge

Judge

Lynn Shores