This is the story of U.S. Marshal Lightning Jim Whipple, his trusty horse Thunder, and his deputy, Whitey Larson. The shows are stereotypical portrayals of Native Americans, the history of the Union-Pacific Railroad, and other Western related subjects.

The program originated in the 1940s and was called The Adventures of Lightning Jim. At this time, it was a West Coast program. The program returned as a syndicated ZIV series in the 1950s and a total of 98 radio programs were produced.