Gangsters try to steal Uuno Turhapuro's father-in-law's money by infiltrating into the family through Uuno, by pretending he has a long-lost son.
Vesa-Matti Loiri
Uuno Turhapuro
Jukka Puotila
Urho Turhapuro
Tapio Hämäläinen
Hugo Tuura
Marita Nordberg
Mrs. Tuura
Marjatta Raita
Elisabeth Turhapuro
Anu Hälvä
Nou
Juha Laitila
Jukka Laaksonen
