In this episode, Hogan and his men paint the gold bars to resemble bricks and make stairs leading to Klink's office out of the painted gold, to store the gold until after the war so they can return it to its original owner. But in future episodes, the old wooden stairs have returned, thereby making the stairs a continuing continuity error.
Nothing is said about what happened to the Capt. Martin character. He was not used in future episodes, yet he did not escape nor was he transferred.
As they are dipping the bricks in molten gold so they look like gold bars, the soldier handling the basket for the cooling/drying process has gold all over his hands. The melting point of gold is 1,948F (1,064C) so his hands would have been severely burned after the first contact with it. In fact, any of them working near the pot of molten gold would have had to wear protective clothing and gloves to shield themselves from the heat.
UPDATE: According to the story line, the prisoners were not dipping the bricks in molten gold, they were dipping them in gold paint.
Correction: The bricks are being dipped in molten gold. When the prisoners are dipping them, Kinchloe is heard saying, "Don't get them mixed up. The bricks you dip in the gold, and the gold you dip in the red paint." Also, the bucket of red paint is obvious, but the bucket of gold is obscured by smoke. If it were just gold paint, it would not be smoking.
UPDATE: According to the story line, the prisoners were not dipping the bricks in molten gold, they were dipping them in gold paint.
Correction: The bricks are being dipped in molten gold. When the prisoners are dipping them, Kinchloe is heard saying, "Don't get them mixed up. The bricks you dip in the gold, and the gold you dip in the red paint." Also, the bucket of red paint is obvious, but the bucket of gold is obscured by smoke. If it were just gold paint, it would not be smoking.
A gold bar the size of the bricks used would weigh close to seventy pounds. A box full of such bricks couldn't be lifted by one average soldier, much less passed from man to man like a bucket brigade as shown. It would also be impossible for them to be lifted with tongs, hung from the belt or lifted by LeBeau.
Gold in the pure form used in bank ingots is so soft that when Klink hits the brick with the rifle butt, the paint wouldn't just be scraped off, the gold itself would be badly dented.
The coffee pot Schultz is carrying (assuming it is full of hot coffee) is not steaming. Since the guards guarding the truck are wearing scarves and gloves, the temperature must be near freezing (if not below), which would cause any hot, water-based liquid to put out steam. Update: While Schultz is pouring the coffee, one of the guards can be heard saying, "Sehr kalt..." meaning 'very cold'.
One of the Gestapo guards who is guarding the gold truck is armed with an American Thompson Sub-machine Gun, which has a 30-round magazine and a fore-grip, rather than a German weapon.
Newkirk adds knock-out pills to the coffee Schultz is carrying to the men guarding the van with the gold. However, he puts most of them in the spout. That type of coffee pot has a strainer in the spout, meaning those pills never got in the coffee. Update: When Newkirk lifts the top of the pot to drop in a couple of pills, the shadow on the inside of the pot (under the hinge) has dots in it from the strainer.
When Schultz is guiding the truck carrying the gold straight forward while hiding it behind Barracks 5, Carter and LeBeau block Schultz and stop the truck. When Newkirk darts the rear tire, there are tracks in the snow from the wheel, but only in one direction - toward the back of the truck. If the truck had been moving straight forward when it was stopped, and the truck's front wheel was not offset from the rear wheel (it wasn't), there would have been tracks from the front tire visible in the same location as the rear tire - meaning there should have been tracks from the tires visible in both directions (toward the front of the truck created by the front tire, and toward the rear of the truck created by the rear tire). Since the tire track only appears toward the rear of the truck, there are a couple of ways this could have happened: 1. The truck was parked, the (fake) snow was added, then the truck was rolled back and forward a short distance to create the track. 2. A set dresser covered over the front tire tracks.
When LeBeau is sawing the top step, he is sawing it right over the center support. However, when Klink eventually steps on that and it breaks, it does not break at the point LeBeau was sawing it. It breaks at two points, one on either side of the center support, and the center support collapses.
The steps that Klink goes down on are not the same steps Schultz walked down on a few seconds earlier. The original steps are even with the point where the porch meets the corner of the building (below the 'Kommandantur' sign). Klink's steps are at least 8 inches shorter (i.e., they are not even with the corner of the building). When Klink goes down, the left supports are new wood, and they do not match up with the original steps. In fact, the marks where the original steps were mounted to the building can be seen at the left end of the steps - the crew did not even paint over the wood of the building. Even in the close-up, after Klink falls, the marks from the old steps are visible on the side of the building.
The truck hauling the gold is a 1950 Ford truck, which wasn't available during WWII.
The "German truck" used to haul the gold is a 1949 Ford, which didn't exist yet.
As Col. Klink exits his office building, he breaks through the sabotaged wooden steps. Once he falls, in his first close-up, he yells for help but there is no audio of his pleas.
Schultz is carrying a pot of coffee to the guards at the truck. He passes by the barracks, and Newkirk and LeBeau stop him. The way the pot moves and jiggles in Schultz's hand, there is no way that there is any coffee in it.
When LeBeau goes to saw the steps, he is holding the saw by the blade, covered by a rag (apparently to hide the blade from any guards who may come snooping). The way he is holding the blade, there is no way that the saw blade is even making any contact with the wood, nor would LeBeau be able to saw the step enough to cause it to fail.
Schultz is taking coffee to the truck guards. When he gets there, he hands the coffee to one of the guards. Schultz gets two cups out of his pockets for the guards and pours the coffee. When Schultz hands the coffee to the first guard, the guard holds the hot pot by the base for a second or so (which may not necessarily be a problem, as he is wearing heavy gloves). However, when Schultz is pouring the hot coffee, he holds the handle of the pot in his right hand, and uses his left hand to support the base of the pot, right where the hot coffee is. Since the pot is just thin metal (and was presumably on a burner while it was steeping), Schultz should have burned his hand on the pot.
After the tire goes flat, Hogan and Newkirk are standing near the front of the truck. Major Krieger unlocks the door of the truck and checks his clipboard. When he closes the door, Newkirk slips a clear piece of plastic into the door, just above the door latch. The implication is that the gang can unlock the door any time they want. However, the location of the plastic is not in a position where it can unlatch the door, as the latch must move UP to open the door, and the plastic strip, being above the latch, could not, in any conceivable way, unlatch the door.