- Country: Sweden
- Genres: Adventure, Family, Mystery
- Release: 1947-12-20
- Director: Rolf Husberg
- Writers: Rolf Husberg , Astrid Lindgren
- Language: Swedish
- Stars: Olle Johansson , Ann-Marie Skoglund , Sven-Axel Carlsson , Bernt Callenbo , Ulf Törneman-Stenhammar , Roberto Günther , Henrik Schildt , Sigge Fürst , Carl Reinholdz , Fritiof Billquist
- Runtime: 91 min
- Awards: N/A
- AKA: The Master Detective Bill Bergson , Mesterdetektiven Blomkvist (Norway) , Mesterdetektiven (Denmark) , Master Detective Blomkvist (United Kingdom) , Master Detective Blomkvist (United States of America) , Meisterdetektiv Kalle Blomquist , Mästerdetektiven Blomkvist , Знаменитый сыщик Калле Блюмквист (Russian Federation) , Mästerdetektiven Blomkvist (Sweden) , Master Detective Blomkvist
- Plot: It's summer. Kalle, Eva-Lotta and Anders have formed a gang, the White Rose. They are in playful battle with Red Rose gang. A relative of Eva-Lotta's mother, Uncle Einar, come to visit and Kalle notice immediately that he is behaving strangely. Einar seems to have hidden something in a closed mine outside town. Two mysterious strangers appear.
- IMDB:tt0039649
Master Detective Blomkvist Cast · · · ALL
Rolf Husberg
Director
Olle Johansson
Kalle Blomkvist
Sven-Axel Carlsson
Anders Bengtsson
Bernt Callenbo
Sixten
Henrik Schildt
Uncle Einar
Sigge Fürst
Constable Björk