Little Martin Returns (1948)

Original title: Lilla Märta kommer tillbaka eller Grevinnans snedsteg eller Den vilda jakten efter det hemliga dokumentet

Sture Letterström and Kurre Svensson take on the task of rescuing a secret document during World War II from a group of Swedish Nazis. Since both of them are known by the local Nazis, Sture takes on the role of Miss Märta Letterström, and Kurre also has to make use of his feminine side as well as a dress.