James Lee Wong
Win Lee, Benton's Secretary
Police Captain Street
Dr. John Benton / Cyrus Benton in Newspaper (as Charles Miller)
Dr. Norman Wilkes
Louise Benton
Charlie Frasier
Detective Grady
Mason
Toreno
Tommy Dean
Jonas
Foo
Radio News Broadcaster
Stakeout Cop
Detective in Refrigerator
Policeman
Police Officer Stationed at Front Door
Extra in Audience at Benton's Lecture
Charley Won