SINOPSIS
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 RogersRoy Rogers
- TriggerTrigger
- Dale EvansLee Madison
- Andy DevineSheriff Cookie Bullfincher
- John McGuireRex Gridley
- Olaf HyttenLionel Bates
- David SharpeUlrich - Henchman
- Fritz LeiberPadre
- Hank PattersonDeaf Bus Passenger
- Fred 'Snowflake' ToonesThe Cook
- Eddie AcuffBus Driver
- Bob NolanBob
- Sons of the PioneersSons of the Pioneers
- Doc AdamsMine Henchman
- Pat BradyBass Player Pat - Sons of the Pioneers
- Keefe BrasselleIgnacio
- Ralph BuckoMine Henchman
- Roy BuckoMine Henchman
- Whitey ChristyMine Henchman
- Victor CoxBus Passenger
- Art DillardMine Henchman
- Hugh FarrFiddle Player - Sons of the Pioneers
- Karl FarrGuitar Player Karl - Sons of the Pioneers
- Fred GrahamMine Henchman Guarding Lee
- Silver HarrMine Henchman