Continuity mistake: Longmire is taping prisoner photos to the wall. When looking at the last photo, the tape is in the middle of the paper. When he puts it on the wall, the tape is on the right side of the paper. When the photo is in the background, the tape is on the left side. (00:59:55)
Continuity mistake: Walt is with Cassie Linder in her family's barn while she tries to get a tractor running. It is dark outside, and before dawn. They talk for a little over a minute of screen time. When Cassie finally gets the tractor up and running and rides out of the barn, it is a bright sunrise.
Continuity mistake: When Walt is talking to the Denver detective, he opens the door to go inside and then the detective says they found the man who killed Walt's wife. Walt stands there, holding the door open still. When the camera angle changes, he's no longer holding the door open and goes to open the door again.
Continuity mistake: Walt shows up to the first crime scene after visiting his daughter. He and Vic begin to discuss the girl. In the first shot of the girl, she is facing the camera and has her eyes closed. The very next shot of her, her head has moved and her eyes are open.
Continuity mistake: In the scene where Branch and his father are target shooting, right before Branch confronts his father about having Longmire's wife murdered, he takes out his ear plugs. Then when his father triggers the trap machine Branch turns his head and you see an ear plug in his ear.
Continuity mistake: At the tribal council hearing, when they vote to oppose, 7 of the 8 raise their right hand (the man at the end raises his left hand). But in the close up panning shot of the raised hands, the guy sitting next to Jacob Nighthorse has his left hand raised. It's back to his right hand when they lower their hands.