Continuity mistake: Throughout this entire season, the blue tape holding the new windscreen in place on Walt's car is constantly disappearing and reappearing. This happens throughout several episodes.
Suggested correction: The tape is only there while the adhesive sets in his continually new windshields, as he only just replaced the windshield and probably took off the tape off camera because it wouldn't add to the plot.
Factual error: The final scene of the episode, the cousins are hiding with other migrants amid a farm truck's bales of straw. One of the migrants claims they are in Texas. However, the mountains in the distance are the Manzano Mountains which are just several miles southeast of Albuquerque, more than 200 miles away from the border with Texas and Mexico. The migrant claims he has gone through this route 3 times, so it is unlikely this would simply be a character mistake.
Suggested correction: He could have just been boasting, whilst not actually knowing where he is. He is just a kid after all.
Worse than all of that, is the fact that you can't get directly from Mexico into Texas without traversing a river. There are no land routes.
There are no bridges?
Continuity mistake: Walt is driving down a deserted road singing "A Horse with No Name." You can see the roadway behind him through the hole in the headrest. At first, the road is empty. But then a white vehicle quickly approaches. The camera angle changes and there are no vehicles behind him, but a police car coming from the opposite direction passes and makes a u-turn. When the camera angle is back inside Walt's car, the white vehicle turns out to be the police car that just made a u-turn. (00:01:00)
Continuity mistake: While Walt is out of his car and arguing with the police officer, there are other cars visible in the far distance behind him. The cars appear and disappear in between shots, there isn't time for them to pass and we don't hear them pass. (00:03:30)
Continuity mistake: When the two guys grab the Ouija board, the 2 games that were on top of the Ouija board disappear instantly. (00:22:30)
Continuity mistake: When Walt throws the pizza on the roof, it lands 5 rows up from the edge. When the camera cuts to on the garage roof, it's only 3 rows up. Also the amount of topping changes between the angles. (00:34:30)
Continuity mistake: Mike's car is not visible when Walt breaks into his own backyard. Mike is still there, as you see him hiding behind the corner, and later getting into his car.
Continuity mistake: When Walter takes Junior home from school, at first there are no shadows or sun hitting the ground in front of the garage. In the next shot the sun appears.
Visible crew/equipment: In the scene after Walter took his son from the school and parks his car in front of their house (before the pizza scene), you can see the camera mounted on a crane while filming the scene reflected on the car's windscreen.
Continuity mistake: Walter is pulled over by a cop. Before the stop, the cop car is to Walter's right. Walt looks in his wing mirror (driver's side) and the cop car is to Walt's left.
Visible crew/equipment: The camera equipment is visible in the bumper of the jeep in the scene where Walt drops Jr. off (before the pizza scene).
