Joachim Gottschalk
as Engelbrecht, Chemiker
Ernst von Klipstein
as Dr. Paul Gildemeister, Chemiker
Hertha Feiler
as Barbara Wrede
Paul Hoffmann
as Dr. Wrede, Barbaras Bruder
Siegfried Schürenberg
as Dr. Marlow, Werkslaborant
Walter Werner
as Hedemeier, Prokurist
Gerhard Dammann
as Julius Hückebusch, Werkmeister
Gerhard Bienert
as Müller, Lagerverwalter
Theo Shall
as René Laroche, Fabrikbesitzer
Ingolf Kuntze
as Dr. Schmidtmann, Bank-Abteilungsleiter
Kurt Mikulski
as Prokurist
Bruno Klockmann
as Thomas, Nachtwächter
