A previous reviewer pointed out that G-Men was not a term used in the old West during the time period in which the program was set. No kidding. They did have U.S. Marshals hired by the government to rule territories that had not officially been set up. In the Golden Age of B westerns, there was a series called the "Rough Riders" which co-starred veteran Westerns stars Buck Jones, Tim McCoy and Raymond Hatton. However the term "Rough Riders" did not gain popularity until Teddy Roosevelt organized a group of cowboys and wranglers to charge up San Juan Hill. No doubt the word G-Men because kids of the Fifties were familiar with it. There were at least three radio programs dealing with the FBI at that time. Gang Busters, F.B.I. in Peace and War and This is Your F.B.I, Russell Hayden was already known to kids as one of Hoppy's sidekicks in the movies and Jackie Coogan was known to adults who recall his childhood movies. In fact, anytime Coogan's name is mentioned, I first think of Cowboy G-Men and Stoney Crockett before I think of Uncle Festus.