The Day They Hanged Kid Curry (90 min.) - S2-E1
Factual error: Wheat refers to the hanging of real-life outlaw Black Jack Ketchum. But Ketchum was executed in 1901. Smith & Jones is set in the 1880s. (00:27:50)
Factual error: Heyes and Curry spend months at the mine without any razors or knives. Their beards grow out - but their hair doesn't get any longer. (00:12:00)
The Posse That Wouldn't Quit - S2-E5
Factual error: Heyes gives Bridget a glowing and accurate description of Denver's Brown Palace Hotel - a landmark that wasn't built until 1892, ten years after the setting here.
Dreadful Sorry, Clementine - S2-E10
Factual error: Heyes burns the photo - but he shouldn't have been able to. In the 1880s, it should be printed on tin and not on paper. (00:11:00)
The Man Who Broke the Bank at Red Gap - S2-E17
Factual error: An egotistical, prissy and dishonest lawyer like Mr. Fletcher wouldn't make the mistake of allowing his name to be misspelled on his office door. It reads "Winfred Fletcher." His first name, as it's pronounced throughout the episode, is "Winford." (00:26:50)
The Men That Corrupted Hadleyburg - S2-E18
Factual error: Heyes plays blackjack with cash instead of chips. When he bets the limit of $1000, he pushes two small stacks of coins toward the dealer. A thousand dollars in coins would have made a substantially larger stack than this. Even if they were $20 gold pieces (which they don't appear to be) the two piles would have to be comprised of 25 coins each, which they are not. (00:30:00)
The Men That Corrupted Hadleyburg - S2-E18
Factual error: Heyes and Curry are reading the Denver Post in the beginning scene, but the Denver Post was not published under that name until 1901, nor published under its earlier name, The Evening Post, until 1893.
Which Way to the OK Corral? - S2-E20
Factual error: Heyes and Curry meet Doc Holliday and Marshall Wyatt Earp in Tombstone. Wyatt, however, was never a marshall in Tombstone, though his brother Virgil was. Wyatt and Doc Holliday both left Tombstone permanently shortly after the OK Corral shootout in 1881, so wouldn't even have been there when Heyes and Curry arrived in 1883. (The year's established by Heyes reading Twain's book published in that year).
Don't Get Mad, Get Even - S2-E21
Factual error: A grumpy Heyes tells Georgette and Curry that he's been sleeping in a stable loft for two days without a bath or a shave. But he's completely clean-shaven: not even a hint of stubble showing. (00:15:00)
Suggested correction: He is not "completely clean-shaven." He has evident facial hair.