Gridley is mining silver from an old Mexican mine and bringing it into the USA thru a passage into his worthless mine. Border guard Rogers suspects Gridley and finally finds the secret entrance to the Mexican mine. He sends Lee Madison for help only to have her captured by Gridley. Trigger brings help that takes care of Gridley's men and now Roy has to rescue Madison.
Roy Rogers
Roy Rogers
Trigger
Trigger
Dale Evans
Lee Madison
Andy Devine
Cookie Bullfincher
John McGuire
Rex Gridley
Olaf Hytten
Lionel Bates
David Sharpe
Henchman Ulrich
Fritz Leiber
Padre
Hank Patterson
Deaf bus passenger
Fred 'Snowflake' Toones
The Cook
Eddie Acuff
Bus Driver
Bob Nolan
Bob
Pat Brady
Pat
