Wrong Train to Brimstone - S1-E4
Factual error: This entire episode takes place in Wyoming, because of the Bannerman plot to ambush the Devil's Hole gang, but a sign at the train station where Heyes and Curry board states the elevation as 2315 feet. No location in Wyoming or northern Colorado is that low. One would have to be in California, Texas, or eastern Kansas or Nebraska. (00:04:05)
Wrong Train to Brimstone - S1-E4
Continuity mistake: Heyes and Curry enter the train depot at 8 pm. It's dark outside. When they come back to the platform, it's daylight. When the train leaves, it's dark again. Midway through its 60-mile journey, there's another shot of the train in daylight, followed again by more night shots. (00:07:30)
Wrong Train to Brimstone - S1-E4
Factual error: When the train is fully boarded, the conductor waves a lamp to signal the engineer. It's supposed to be 8 pm at night, but it's suspiciously sunny on the platform - and the signal lamp is noticeably not lit. (00:08:45)
Wrong Train to Brimstone - S1-E4
Continuity mistake: While Heyes and Curry are guarding the gold shipment, Heyes' hat keeps changing positions on his head between takes. First it's down over his hairline, then it's pushed back, etc. (00:26:50)