Landowner Klapproth would love to have his nephew Alfred show him the inside of an insane asylum and meet real lunatics, promising to financially support him in starting a business. Alfred's friend Ernst Kissling recommends that he show his uncle the Schöller Guesthouse, whose guests are quite eccentric. Landowner Klapproth, who truly believes the guests to be lunatics, is thoroughly amused.
Maxi Böhm
Ladislaus Robitschek

Helli Servi
Ulrike, seine Schwester
Birgit Machalissa
Paula
Irmgard Kloiber
Ida

Alexander Waechter
Alfred, Ladislaus' Neffe
Bernd Ander
Robert, sein Freund

Bert Fortell
Bernhardi, ein Weltenbummler
Marianne Chappuis
Sophie Malzpichler, Schriftstellerin
Kurt Nachmann
Schöller, Pensionsinhaber

Marianne Schönauer
Amélie, seine Frau

Ulli Maier
Frieda, beider Tochter
Alfred Böhm
Leo, Schöllers Bruder
Georg Hartmann
Kloss, Major a.D.
Cissy Kraner
Wally Staudinger, Sängerin
Michael Toost
Josef, Oberkellner