Continuity mistake: At the end of the previous episode, when Mei's father Ah-Tao dies she touches his face (after Buchanan joins the room) and she is wearing dark red fingernail polish with jewels. At the beginning of this episode showing the same scene, Mei no longer has polish on her nails.
Continuity mistake: A parcel is thrown from the stagecoach and lands just off the left foot of the person expecting it. The following quick shot shows the same man bending to pick it up, but this time the package is centered and directly in front of his feet.
61 Degrees - S5-E10
Continuity mistake: After Durant is smacked in the mouth by the rancher, the blood on his face and shirt changes position, shape, and even disappears and reappears.