Other mistake: At an RV park, Hank is investigating an RV that looks like the one he saw in the pictures from the ATM camera. Desperate for a vantage point, he goes around to the back of the RV and starts to climb up the ladder on the passenger rear side of the vehicle. This RV is not supported at this time in a permanent fixture, as it's revealed shortly there after that the occupants were just on vacation. So Hank's full body weight getting on the back corner of the RV should have shifted it on it's suspension and alerted the people inside that something was going on far sooner than it did.
Continuity mistake: Sitting outside a crack house looking for Jesse, Mike and Walt are talking in Mike's car. When Mike says he could just be mugged or shot, the camera is behind their heads. Walt turns his head towards Mike while he's saying this. When the camera angle changes, suddenly Walt is looking out of the passenger window again.
Dead Freight - S5-E5
Audio problem: The engine's horn sound constantly changes before the train is robbed. And when the train begins to move again, a railroad crossing bell is heard, even though the crossing ahead just has crossbucks.
Factual error: On the radar screen, a flight, SAA332 is seen. SAA is the icao code for South African Airways, which did not serve any city near Albuquerque in 2009.
To'hajiilee - S5-E13
Continuity mistake: When Hank looks for Walt in the desert, the weather changes from shot to shot. One shot is fully lit with sharp shadows and blue sky, the next one has no shadows with an overcast sky, back to blue sky and hard shadows. That goes on for about 20 seconds until Walt surrenders to Hank.
Say My Name - S5-E7
Continuity mistake: When Walt places the wire under his wrist strap its position keeps changing. Note the exposed wire in relation to the strap.
Audio problem: When Jesse rings Jane's phone when it's cut off, Jesse is still pressing buttons but there is no sound, despite there being sound when he pressed buttons before.
Suggested correction: He only presses 2 buttons. Anything else is just something like his thumb twitching, like he's anxious or nervous. You see him call Jane's phone multiple times by only pushing 2 buttons.
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.
Other mistake: There is no P-trap beneath the red sink in the Madrigal offices.
Box Cutter - S4-E1
Continuity mistake: During the diner scene when Jesse is eating, Walt asks him how he's doing. Jesse's head changes positions several times between shots. From looking out of the window, to back down at his plate, to back out of the window, to straight ahead again, all between shots.
4 Days Out - S2-E9
Revealing mistake: There are no water cooling tubes attached to the reflux condensers. Reflux condensers do not condense without cooling. (00:15:40)
Continuity mistake: At the end of the episode when Walt and Jesse are leaving the junkyard, the camera pans to Tuco and Ganzo watching them drive away. However, this is at the same time Ganzo is moving No Doze's body and is subsequently crushed by a car.
...and the Bag's in the River - S1-E3
Other mistake: Walt pushes water jugs and several items toward Krazy 8 who is locked in the basement. Notice the ground has been disturbed where the jugs slide, indicating previous takes.