Factual error: A character in the episode has invented denim, but denim was invented in 1873 and was being used widely up to the time period of the series, which is set in 1893.
Revealing mistake: The stick of dynamite Brisco throws lands to the right of where the pyrotechnic for the dynamite explodes.
Continuity mistake: Aaron Viva grabs a slice of pie with his left hand, but the next shot shows him using his right hand.
Continuity mistake: Brisco's hands are folded close to his chin as he talks to the Generalissimo in the frontal shots of him, but then a rear shot shows him raising his hands form the table to fold under his chin.
Continuity mistake: Dixie enters the barn through the heavy wood door and closes it behind her, but shortly after that, a man with a torch closes the door again.
Continuity mistake: The kerosene lamp by Brisco's head disappears in the shots with the Professor kneeling beside him, but reappears in the shots of Brisco without the Professor.
Continuity mistake: On the train, Marshall Brisco County's pipe instantly moves from being at his chin level in one shot, to further from his body and at eye level in the next shot.
Continuity mistake: After stopping the train and shoving the gang plank to the rail car's roof, two of Pete's men cross the plank to the car. In the first shot after they are already at the end of the car, but in the subsequent shot those same men are running towards the end of the car.
Continuity mistake: The burning fuse of the dynamite bundle on Brisco Jr.and Lord Bowler's table changes location as it burns - some shots the flame is close to the dynamite, other shots the flame is further from the dynamite, then back to close.
Continuity mistake: Brisco is being hanged by the Mexicans and his hands are tied. When one of the bad guys shoots the rope and Brisco escapes, his hands are untied.
Factual error: Modern electrical towers are seen on the hilltops in the background as Brisco County, Jr. chases after Falco's bandito.
Suggested correction: The entire series was set in an alternate history of sorts, so most, if not all, historical "inaccuracies" cannot be regarded as mistakes.
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