The Mystery of Betty Bonn
Directed by	Robert A. Stemmle
Written by	Ernst Hasselbach Robert A. Stemmle
Based on	Der Streit um die Betty Bonn by Friedrich Lindemann
Produced by	Ernst Krüger Hans Herbert Ulrich Georg Witt
Starring	Maria Andergast Theodor Loos Hans Nielsen Erich Ponto
Cinematography	Otto Baecker
Edited by	Herbert B. Fredersdorf
Music by	Herbert Windt
Production company	Georg Witt-Film
Distributed by	UFA
Release date	4 February 1938 (1938-02-04)
Running time	94 minutes
Country	Germany
Language	German

The Mystery of Betty Bonn (German: Das Geheimnis um Betty Bonn) is a 1938 German adventure film directed by Robert A. Stemmle and starring Maria Andergast, Theodor Loos and Hans Nielsen.^[1] The film was shot at the Babelsberg Studios in Berlin with sets designed by the art directors Wilhelm Depenau and Ludwig Reiber. It was made by the leading German company UFA, based on a novel by Friedrich Lindemann.

A British attorney working on a small island wants to return home to London, but first has to solve a mysterious crime.

• Kreimeier, Klaus (1999). The Ufa Story: A History of Germany's Greatest Film Company, 1918–1945. University of California Press. ISBN 978-0-520-22069-0.

• The Mystery of Betty Bonn at IMDb