Goofs

The shorter crop of hair on Walter in the flash forward is inconsistent with the longer, messier head of hair he sports when the series finally catches up with the sequence, which only covers just over a day, at the end of the series's run.

When doing the junkyard test, the camera shots featuring Jesse show a completely overcast sky. The camera shots that feature Walt are sunny, shadows included..

The magnet is powered by a series of DC batteries, yet is controlled by an AC Variac. This is impossible. Also, the magnet would be nowhere near powerful enough to do what is shown.

The writing behind the broken picture says 'Banc Suisse' instead of 'Banque Suisse'.

Wiring another set of 21 batteries in parallel would cut the internal resistance of the battery array by half, but it would not double the amperage, as Walt seems to believe. It would increase the current and power a little bit (because the internal resistance is lower, the battery voltage would be a little higher under full load). It would be much more effective to increase the voltage by adding a few batteries In series with the existing 21. But, just a few, otherwise the magnet could be blown out. Standard salvage yard magnets are 250vDC (and 50 amps or so), so they got that right.

When Walt and Jesse are in the magnet truck at the evidence depot, as Walt turns up the power on the magnet, the controller box is either made of steel or has steel components. It should have been pulled towards the magnet. When they tested the magnets in the junkyard, Walt had to be far from the magnet for that reason.

Old Joe states before the magnet is put to test in the junkyard, "Remove anything metal." However, the officer's gun, belt, badge, etc. do not get pulled by the magnet's force when he opens the door to the evidence room.

Ted's brace that is supposedly attached to his skull is clearly moving independent of his skull.

At 36:36 a close up of the evidence bag on the line marked "Description of enclosed evidence" a person's name is written on it and the line marked "Description of Offense" has what should be the enclosed evidence (roofing hammer) written on it.

In the opening scene, Walt shows the waitress his ID as per her request to claim a free breakfast on his birthday. More than likely, "Mr. Lambert" ID will not show the same birth date as Walt's.

When Ted is shown with a shaved head in the hospital wrinkles in the plastic bald cap can be seen on his scalp.

In the junkyard when Walt tells Jesse he hasn't got any money right now it's clearly not Brian Cranston's voice.

When the officer in the evidence room is filing items in his computer he incorrectly spells Beretta as "Baretta".