Sidney Toler
Charlie Chan
Acting
Victor Sen Yung
Jimmy Chan (as Sen Yung)
Acting
C. Henry Gordon
Dr. Cream
Acting
Marc Lawrence
Steve McBirney
Acting
Eddie Marr
Henchman Grenock
Acting
Charles Wagenheim
Willie Fern, museum watchman
Acting
Joan Valerie
Lily Latimer
Acting
Marguerite Chapman
Mary Bolton
Acting
Hilda Vaughn
Mrs. Joe Rocke
Acting
Harold Goodwin
Edwards, radio sound man
Acting
Ted Osborne
Tom Agnew (as Ted Osborn)
Acting
Archie Twitchell
Carter Lane
Acting
Michael Visaroff
Dr. Otto Von Brom
Acting
Joe King
Inspector O'Matthews
Acting
Charles Trowbridge
Judge
Acting
Emmett Vogan
Prosecuting Attorney
Acting
Stanley Blystone
Courtroom Officer
Acting
Jimmy Conlin
Tour Bus Barker
Acting
Brick Sullivan
Detective Pete
Acting
Walter Bacon
Sidewalk Passerby (extra)
Acting
David Newell
Attorney at Trial (extra)
Acting