While most of the characters in this are fictional, William "Bigfoot" Wallace was a real person, he is one of the most famous real life Texas Rangers. In real life he survived the "Black Bean Incident" and went on to command his own unit of Texas Rangers. He later participated in the Mexican-American War Battle of Monterrey and the Comanche Wars. During the Civil War he helped defend the Texan frontier against Comanche attacks. He actually survived all these battles and died of natural causes in 1899 at the age of 82.

There are several firearms throughout the mini-series that should not be there as they didn't exist at the time. Bigfoot Wallace was using a Remington model 1858 rifle, but as the model name indicates that rifle was not available until 1858, Dead Man's Walk takes place in 1842. Several people, including Captain Salazar and Gus, are seen using Colt Walker revolvers, but they were not available until 1847.

Followed by Comanche Moon (2008)