In a small town called Skrabbarp in Southern Sweden lives the school teacher Sebastian Pettersson, an amateur detective and one of the most diligent correspondents of the Stockholm police.
| Actor | Role |
|---|---|
 Nils PoppeSebastian Pettersson | Sebastian Pettersson |
 Gunnar BjörnstrandZdenko Zapatil | Zdenko Zapatil |
 Adolf JahrAlbin Kvist | Albin Kvist |
 Inga LandgréElise | Elise |
 Kenne FantHolger | Holger |
 Gull NatorpMrs. Uggla | Mrs. Uggla |
 Märta DorffHildur | Hildur |
 Dagmar EbbesenMrs. Valldin | Mrs. Valldin |
 Ragnvi LindbladhLilly | Lilly |
 Henrik SchildtErik | Erik |
 Börje MellvigChief Constable Bertold | Chief Constable Bertold |
 Helge HagermanSvensson | Svensson |
 Fritiof BillquistSvedje | Svedje |
 Arne LindbladDrifter | Drifter |