When Noah is interviewing Chris for a biography, Noah asks about an Indian siege the Chis participated in. Chris lists the others involved and mentions Bat Masterson. It is the only time in the film series that a real life gunfighter is mentioned. Bat Masterson was a gunfighter who was famous for being the Sherriff of Ford County, Kansas based in Dodge City.
In the final shootout in town, Chris shoots the bandit chief off his horse. The bandit chief is blown backwards off his horse, but Chris is shown on his left hand side, ninety degrees from the way the bandit is blown off his horse.