When informed of her brother's death, Nancy drops a bottle onto the ground. A moment later it is back in her hand and she drops it again.
At about 1:58, before the shootout the two horses outside the cabin are brown and dapple grey. When the shooting starts and the horses run off, both are dapple grey.
When the McCoy sons are lined up and shot to death for the murder of Ellis Hatfiled, Tolbert McCoy is visibly shot in the chest several times, but when they scene jumps and he swings around the tree, their are no more bullet holes.
At about 10 min into the episode, at the shooting competition in the woods, an US flag with 40 stars is on display. While the design was in fact developed, it never saw official use, as the official design went straight from 38 to 43 stars.
Paris McCoy was not killed during the feud. He died in 1918, many years after the feud had ended.
Paris McCoy was not killed by The Hatfield Clan during the feud,a feud which spanned the years between 1863-1890. Paris McCoy died in 1918, decades after the feud had ended.
Johnse said he just built the cabin but the exterior boards are severely weathered when they should have been new or freshly hewn.
Bad Frank has a fake accent that is totally wrong for the area.
When Phamer shoots Ellison, smoke is seen coming from his pistol before the shot is heard.
Preacher Garrett quotes out of a 20th century Bible Translation.