Harry Piel as Harry Peters, Kriminal-Assistent

Henry Lorenzen as Erich Wilke

Alfred Haase as Hildebrandt, Kriminalrat

Lissy Arna as Frau Woerden, Pensionsinhaberin

Ernst Legal as Emil Müller

Trude Hesterberg as Emmi Gärtner

Paul Westermeier as Emil Kruppack / William Hopkins

Else Reval as