The fort at the Vasquez Rocks location, used here as a prison, was built by Columbia Pictures in the mid-'50s for the TV series Tales of the 77th Bengal Lancers (1956), at a cost of nearly $118,000.
When in the saloon, the bartender tells Billy that he can't serve minors. Paul Hampton was 31 or 32 when this was filmed.
Vincent Price, born and raised in St. Louis, is seen driving a wagon being hauled by two Clydesdale horses which are synonymous with the St. Louis brewery Budweiser. The wagon is also festooned with posters hyping the great St. Louis train robbery of which there never was one.