Escaped criminal "The Fox" hates Hoppy and a Rurales colonel for imprisoning him and lures Cassidy to Mexico in order to exact his vengeance.
William Boyd
as Hopalong Cassidy
George 'Gabby' Hayes
as Windy Halliday
Russell Hayden
as Lucky Jenkins
Paul Sutton
as The Fox
Al Ernest Garcia
as Don Carlos Gonzalez
Jan Clayton
as Anita Gonzalez
Trevor Bardette
as Colonel Gonzalez
Betty Amann
as Janet Leeds
Anna Demetrio
as Elena
Glenn Strange
as Burke
Tony Roux
as Pancho
Fred Burns
as Henchman
