Chester Morris
Horatio 'Boston Blackie' Black
Jeff Donnell
Anne Parks Duncan
Richard Lane
Inspector John Farraday
Dusty Anderson
Sandra
George E. Stone
The Runt
Frank Sully
Detective Sergeant Matthews
Marvin Miller
Dr. Nejino
Wilton Graff
Rex Duncan
Murray Alper
Eddie Alexander, Chauffeur
Forbes Murray
Dr. Purcell Nash