Fritz Lang	...	(Director)
Thea von Harbou, Fritz Lang	...	(Writer)
Peter Lorre	...	Hans Beckert
Ellen Widmann	...	Frau Beckmann
Inge Landgut	...	Elsie Beckmann
Otto Wernicke	...	Inspector Karl Lohmann
Theodor Loos	...	Inspector Groeber
Gustaf Gründgens	...	Schränker
Friedrich Gnaß	...	Franz, the burglar
Fritz Odemar	...	The cheater
Paul Kemp	...	Pickpocket with six watches
Theo Lingen	...	Bauernfänger
Rudolf Blümner	...	Beckert's defender
Georg John	...	Blind panhandler
Franz Stein	...	Minister
Ernst Stahl-Nachbaur	...	Police chief
Gerhard Bienert	...	Criminal secretary

Summary: When the police in a German city are unable to catch a child-murderer, other criminals join in the manhunt.