Continuity mistake: All through the episode, we are in a snowy, wintry camp surrounded by hills and trees. The target Gen. Burkhalter points out however is a little shed on a flat-as-a-board prairie with not a flake of snow OR a single hill visible anywhere, and the brown grass of late summer. (Yes I noticed there are some mountains off in the distance. So not relevant for this mistake).
Factual error: About 10 minutes into the show, Newkirk is using binoculars to watch Klink put the combination into his safe. He goes one direction for the first number, the opposite direction for the second number, then goes in the same direction for third number. Opposite for the fourth number. For the radial tumblers to set, it has to be alternating directions.
Revealing mistake: When the homing bomb hits Burkhalter's car because Klink used the radio, you can see the mini tank from "Tanks for the Memory" (s2e9) sticking out of the wreckage.
Continuity mistake: After Newkirk photographs the blueprints, he loosely rolls them up and goes to hand them to Carter. A second later, they are tightly rolled with a rubber band around them.
Continuity mistake: The boxes being carried into the buildings in the beginning of the episode were about sixteen inches high by three feet long. When the bomber plane is dropping bombs, what drops out is a lot bigger than the dimensions of the boxes.
Continuity mistake: In Room 210, Newkirk's sleeves are down to his wrists, but in the close up of his hands, the sleeves are totally missing.
Visible crew/equipment: As Hogan, Le Beau, Kinch, and Schultz talk at the car, the boom mic is reflected in the chrome and on the hood.
Revealing mistake: The bunk that is the entrance to the tunnels appears to be moving upward about a split second before Newkirk taps the hidden key to activate it.
Other mistake: Hogan is disarming a booby trap briefcase. The bomb expert tells him over the radio he has to decide to turn the handle clockwise or counterclockwise. The expert doesn't know which way to turn it. Hogan turns the handle counterclockwise and disarms the booby trap, and the expert says counterclockwise. There's no way the expert would have known which way Hogan turned the handle. (00:21:50 - 00:22:26)
Other mistake: As the boys are unloading the truck, one of the cases is WEIN (wine) , and marked with a 'Z' in the corner. In Season 4 Episode 22 "The Purchasing Plan", the boxes marked "Z" were boxes containing nitro glycerin for the underground.
Continuity mistake: In this episode, the picture next to the light switch wire is a group seated around a table. In "The Defector" (S5:Ep10) the picture was of Hitler making a speech, and the microphone he's speaking into hides the Heroes' bug.
Continuity mistake: As the men are lined up, Klink starts to grill Hogan. Klink has his pistol aimed directly at Hogan, then it's at a 35 degree angle toward and close to Hogan's face. A moment later it's about two feet away from his face.
Continuity mistake: Toward the end of the episode, Hogan turns Shultz around, grabs one of the grenades Shultz is carrying, and hands it off. The one grabbed was closest to Shultz's left side. A few moments later, Shultz turns his back briefly to the camera; there is now a space between the grenades, as if Hogan grabbed the middle one.
The Antique - S5-E12
Character mistake: Schultz states "In Hammelburg, they call me die Glitterzehe", which is a literal (but wrong) translation of the term "twinkle toes." That term does not exist in German, and even if it did, it would have to be GlitZerzehe, because the German word for twinkling is 'glitzern', the word 'glittern' does not exist.
The Antique - S5-E12
Visible crew/equipment: When Burkhalter first comes into the office, the camera rolls a little closer. As it does, you can see the shadow of the camera on Burkhalter's arm.
Continuity mistake: As Schultz takes the balloons away from Hogan, Newkirk is nowhere to be seen. A second later, he witnesses the entire scene.
Continuity mistake: As Klink asks about the forecast, his hand is around the microphone end of the receiver, then a moment later it's around the handle.
Audio problem: When Klink comes into the barracks, he puts the bottle of alcohol into his jacket to hide it. When he does, you hear a distinct clink (no pun intended) of glass on metal. None of the POWs wear anything that would cause this.
Continuity mistake: Before Hogan lets Klink have the ball to hit, the camera does a close up on the volleyball. It can be seen to be a dull light brown color. After Klink hits it, and it soars up into the air the camera cuts to Hogan and Klink, and back again. When it does the ball is now a shiny orange like color.