Factual error: Lucas and Mark are traveling on what is said to be the first train to ever reach the town of North Fork. The episode is set in the 1880s and the train shown was part of the M.K. & T. Railroad, which at that time was operating only in Missouri, Kansas, Texas and Oklahoma. The fictional town of North Fork is located in New Mexico Territory.
Factual error: Ralph Hayden hires Mario Rosati to kill Lucas McCain, who had shot and wounded Hayden many years before. Hayden says McCain previously lived in Enid, Oklahoma. "The Rifleman" is set in the 1880s and Enid did not exist until 1893. (00:01:10)
