On screen
Cast
20 credited performers
Keye Luke
James Lee Wong
Artwork unavailable
Lotus Long
Win Lee, Benton's Secretary
Grant Withers
Police Captain Street
Artwork unavailable
Charles Miller
Dr. John Benton / Cyrus Benton in Newspaper (as Charles Miller)
Huntley Gordon
Dr. Norman Wilkes
Virginia Carpenter
Louise Benton
John Dilson
Charlie Frasier
Paul McVey
Detective Grady
John Holland
Mason
Artwork unavailable
Richard Terry
Toreno
Robert Kellard
Tommy Dean
Willy Castello
Jonas
Lee Tung Foo
Foo
Lynton Brent
Radio News Broadcaster
Jack Cheatham
Stakeout Cop
Heinie Conklin
Detective in Refrigerator
William Gould
Policeman
Artwork unavailable
Bruce Mitchell
Police Officer Stationed at Front Door
Artwork unavailable
William J. O'Brien
Extra in Audience at Benton's Lecture
Victor Wong
Charley Won