91:an Karlsson muckar (tror han)
In the last film of the original 91 film series two letters - one written in spite and another in love - end up in the wrong hands, while 91 and 87 as usual try to avoid ending up in military arrest.
Directors: Åke Grönberg
Writers: Per Lennart Ekström, Rudolf Petersson
Cast
IMDB: tt0053562