Eduard von Winterstein

as Prof. Walter Sonnenbruck

Maly Delschaft

as Bertha Sonnenbruck

Ursula Burg

as Ruth Sonnenbruck

Raimund Schelcher

as Dozent Joachim Peters

Harry Riebauer

as Student

Herbert Köfer

as Christian Föns

Käte Alving

as Agnes Sörensen

Friedrich Maurer

as Tourterelle