* Karl-Heinz Schroth as Inspektor Quarles
* Renate Schroeter as Inspektor Quarles' wife
* Hans Clarin as Inspektor Quarles' assistant
* Horst Tappert as Kriminalrat
* Werner Peters as Gefängnisdirektor
* Kurt Schmidtchen as Staatsanwalt
* Friedrich Schoenfelder as Richter
Supporting cast
* Eva-Maria Meineke as Frau des Gefängnisdirektors
* Hans-Joachim Kulenkampff as Fernsehmoderator
* Heinz Reincke as Reporter
* Eddi Arent as Barkeeper
* Heinz Drache as Gangsterboss
* Karin Dor as Gangsterbraut
* Joachim Fuchsberger as Gangster
* Götz George as Gangster
* Harald Juhnke as Gangster
* Klaus Kinski as Gangster
* Peter van Eyck as Gangster
* Wolfgang Preiss as Gangster
* Horst Frank as Gangster
* Heinz Reincke as Reporter
* Klausjürgen Wussow as Kriminalkommissar
* Friedrich von Thun as Kriminalkommissar
* Peter Vogel as Kriminalkommissar
* Barbara Rütting as Kriminalkommissarin
* Gisela Trowe as Kriminalkommissarin
* Monika Lundi as Kriminalkommissarin
* Susanne Hsiao as Kriminalkommissarin
* Cornelia Froboess as Kriminalkommissarin
* Uschi Glas as Kriminalkommissarin
* Erika Pluhar as Kriminalkommissarin
* Senta Berger as Kriminalkommissarin
* Ruth Leuwerik as Kriminalkommissarin
* Barbara Sukowa as Kriminalkommissarin