Other mistake: The same dungeon set is used several times throughout the series, just furnished differently.
The Spy Who Met Himself - S3-E1
Revealing mistake: When Max is thrown in the dungeon, the man being dragged down the steps is not Don Adams.
The Spy Who Met Himself - S3-E1
Revealing mistake: In a few shots of the dungeon scene, both Maxes are shown. The one with his back to the camera has a different-shaped head to Don Adams, revealing him as a double.
The Spy Who Met Himself - S3-E1
Other mistake: Max cuts through bars to escape his prison cell, but when he cuts them, he does the top part of two of them, and then the bottom part of only the left one.
The Spy Who Met Himself - S3-E1
Revealing mistake: Siegfried shoots his two thugs, but neither one has a bullet hole in their jackets when they get shot.
The Mess of Adrian Listenger - S5-E18
Continuity mistake: Max and 99 are sitting on the sofa. There is a knock at the door and Max fires 3 bullets into the door from a gun. Later, the same day the door is shown behind Max and 99 and there no gunshot holes in the door. Also, 99 changed her clothes and Max still has on the same clothes. (00:09:00 - 00:19:00)
Deliberate mistake: They show footage of Max and Larabee scouting out the entrance to a bank. This same footage was used in the earlier episode "The Treasure of C.Errol Madre".
Revealing mistake: Any time a laser is fired in the show, there are no scorch marks on the walls where they hit.
Visible crew/equipment: When Max and 99 are trapped in the room with the hatch that leads down to the Guru's chamber, the filmmakers didn't bother to make it seem like a giant hole in the ground, and they also didn't bother about the floor of the set being about ten centimetres below the hatch.
Continuity mistake: When anybody dives into the lake, their wetsuits are black. But in the water, they are grey.
Plot hole: Zharko's process of using the dead bodies of agents and reviving them could only work if he had them at about at most a day after they were killed. Since his secret lab is on a deserted island in the middle of nowhere, they could not have got the bodies to him in time. The Chief also said that the bodies suffered severe damage, so their ability to move would be seriously hindered, but they work fine.
Closely Watched Planes - S4-E3
Factual error: If there really was a hatch leading into mid-air in the airplane bathroom, instead of being soundless like shown, it would be incredibly loud and Max would have noticed. Also, the sudden pressure change would have sucked him out no matter what he did to stop it.
Character mistake: The leader of the Purple Knights says that they would only be bike riders if they couldn't tell which gender someone was by their hair. This is a major mistake, because if you look at the hair of the Purple Knights, it's incredibly easy to tell which gender someone is.
Revealing mistake: When Hymie does the high jump, when the film cuts to a shot of him clearing the bar, Hymie's hair is curly when it should be flattened down like when he took of and as he landed. It is obviously a stunt double.
Audio problem: Max is firing a weapon on the garbage scow when his gun suddenly stops. He exclaims "It's jammed!", but his lips don't move. Also, what is he firing at? There's nobody there.
Plot hole: The scheme to lead a blindfolded Max and 99 to what they think is the airport via an illusion room would not work the way they do it. Since the base is underground, there is no way that what they did to represent ascending to ground level that would make a person think they were above ground.
To Sire, with Love: Part 2 - S4-E21
Revealing mistake: When the tarantula is released into the room, the spider is a plastic model in its container when it's on Max's shoulder, and when they kill it with the horseradish.
Revealing mistake: When Max and the other control Agents are old, you can see the powder on their faces used to make them look old.
Visible crew/equipment: In the motorcycle joust sequence, when the Purple Knight falls off his bicycle, his helmet flips up and you can see it's a stunt double - the Purple Knight's beard is gone.
