Max Herbrechter

as Klaus

as Klaus Schneider

as Adolf Westphal

as Ole zu Esteburg (6 episodes)

as Klaus Schneider

as Opa

as Bergmann

as Harald Vestergaard

as Klaus

as Bergmann

as Benedict Wagner (1 episode)

as Ingo Ehrlich

as Gustavsson

as Lorenz Huber (1 episode)

as Bernd Severin

as Tante Helmut (1 episode)

as Herr Krupp

as Prof. Feuerstein

as Gustavsson

as Hannes Limburg (1 episode)

as Tomislav Kovacic (18 episodes)