Code of the Secret Service was the second of Warner Bros. "Brass Bancroft" series, starring Ronald Reagan as troubleshooting federal operative Bancroft. This time, Brass and his wisecracking partner Gabby (Eddie Foy Jr., brother of producer Bryan Foy) take on a particularly vicious gang of counterfeiters. Our heroes end up in Mexico, where they undergo a series of wild and wooly adventures the like of which were seldom seen outside of the Republic serials. According to Reagan, he was obliged to do his own stunts in the film because the budget couldn't afford a double; it certainly looks that way. Entertaining in its own dizzy fashion. Code of the Secret Service is proof positive that Reagan could carry a film with the right material.
~ Hal Erickson, All Movie Guide