- Country: USA
- Genres: Western
- Release: 1938-09-09
- Director: Edward D. Venturini
- Writers: Clarence E. Mulford , Harrison Jacobs
- Language: English
- Stars: William Boyd , George ‘Gabby’ Hayes , Russell Hayden , Paul Sutton , Al Ernest Garcia , Jan Clayton , Trevor Bardette , Betty Amann , Anna Demetrio , Glenn Strange
- Runtime: 67 min
- Awards: N/A
- AKA: A Filha do Zorro (Portugal, Portuguese Republic) , Felicidade em Brumas (Brazil) , Hopalong i Mexico (Denmark) , In Old Mexico , Bandithøvdingen (Denmark) , Return of the Fox (United States of America) , In Old Mexico (United Kingdom) , In Old Mexico (United States of America) , Der Rächer von Old Mexico , Schüsse in der Prärie (Germany) , Bill Cassidy i Mexiko (Sweden)
- Plot: Some years before, a vicious criminal and master of disguise known as 'The Fox' is captured by Rurales Colonel Gonzalez and Hoppy working undercover. When 'The Fox' escapes from prison, he vows to exact vengeance from the two lawmen. He lures Cassidy south of the border with a forged letter from Gonzalez and murders Gonzalez in cold blood. Aiding 'The Fox' in his plans is his sister Janet, to whom the chivalrous Hoppy finds himself attracted.
- IMDB:tt0030270
In Old Mexico Cast · · · ALL
Edward D. Venturini
Director
William Boyd
Hopalong Cassidy
George ‘Gabby’ Hayes
Windy Halliday
Russell Hayden
Lucky Jenkins
Paul Sutton
The Fox
Al Ernest Garcia
Don Carlos Gonzalez
Jan Clayton
Anita Gonzalez
Trevor Bardette
Colonel Gonzalez
Betty Amann
Janet Leeds
Anna Demetrio
Elena
Glenn Strange
Burke
Tony Roux
Pancho
Fred Burns
Henchman
Cliff Parkinson
Henchman