When the mathematics teacher discovers a love letter from his daughter, family father Felix Schneider is suspected of having a secret lover.
Dr. Felix Schneider
Professor Karl Stieglitz
Paul Fellmeier
Olga Fellmeier
Lilli Schneiders Mutter
Hilde
Hertha Nepalek
Lilli Schneider
Brigitte Schneider
Marie (Dienstmädchen)
Rosi Stieglitz
Dr. Haberer
Herr Kraus
