At a restaurant, the coats of flea expert Professor Loris and Lieutenant Juncker are mixee up. Thus Juncker finds the professor's notes for the next day, and makes a bet with his cronies that he should be able to carry out the professor's daily program without being exposed.
| Actor | Role |
|---|---|
 Elis EllisLöjtnant Juncker | Löjtnant Juncker |
| JJean ClaessonProfessor Clasik | Professor Clasik |
| AAnna BjörkmanIna Floor - Professorns systerdotter | Ina Floor - Professorns systerdotter |
 Frans Oskar ÖbergProfessor Loris | Professor Loris |
 Karin AlexanderssonProfessorns faster | Professorns faster |
 John BotvidGymnastiserande herre | Gymnastiserande herre |
 Gabriel AlwJunkers kumpan | Junkers kumpan |
 Tekla SjöblomHushållerskan | Hushållerskan |
 Sture BaudeJunkers kumpan | Junkers kumpan |
 Lilly CronwinBlomsterhandlerskan | Blomsterhandlerskan |
 Helge KihlbergNot listed | Not listed |