Uuno is forced to complete his mandatory military service when it is revealed that he only spent one day in the army in his youth. As is typical of the Turhapuro series his family and friends become closely tied in with these events. His friends Härski Hartikainen and Sörsselssön return to the army for a refresher course and by chance Uuno's father-in-law, Councillor Tuura is made the Finnish Defence Minister. In one of the most memorable scenes, Uuno's wife, Elisabeth, dresses as Uuno and substitutes him for a day as Uuno has an apparently urgent meeting (at a restaurant) and while becoming lost in the woods with a malfunctioning radio, Tuura accidentally declares war on Sweden.
Vesa-Matti Loiri
Marjatta Raita
Tapio Hämäläinen
Marita Nordberg
Simo Salminen
Elli Castrén
Spede Pasanen
Jyrki Kovaleff
Mauno Blomqvist
Jarkko Rantanen
Yrjö Parjanne
Eero Pikkarainen
Hannele Lauri
Helge Herala
Maija-Liisa Peuhu
Ismo Kallio
Ville-Veikko Salminen
Juhani Kumpulainen
Ulla Tapaninen
Riitta Väisänen
Aarno Sulkanen
Aimo Tepponen
Aarre Karén
Esa Anttila
Mikko Kivinen
Ville Sandqvist
Tauno Lahtinen
Einar Vuorenmaa
Mikko Sergejeff
Merja Kuisma
Kalle Holmberg
Pekka Vennamo
Jorma Ojaharju
Jukka Sipilä
Veikko Kerttula
Riki Sorsa
Ensio Itkonen
Jari Lappalainen
Károly Garam
Olli Rahnasto
Raymond
Eini