Plot hole: When the watch is sucked to the island by the magnet, where was the sailor that the watch was attached to?
Revealing mistake: When Max and 99 are rowing away on the Chief's inflated diving suit, you can see that the Chief is not in the suit and it is just an inflatable raft.
Revealing mistake: Siegfried uses the magnet to push the ship away from the island. However, you can see the scene is reversed; the steam from the ship is going back into the funnel.
Revealing mistake: When Max accidentally shoots the life raft with the flare gun, he visibly doesn't make a hole in the raft. It's likely it's ink or ash or another black material to look like the raft had a hole burned through it.
The Day They Raided the Knights - S4-E16
Continuity mistake: In Max's apartment, Max sneaks up behind 99 to give her a kiss. She punches him in the jaw and he falls back against the wall to the right of the doorknob. The scene changes to a close up of Max and he is sitting on the floor to the left of the doorknob.
Continuity mistake: Max is going to pour tequila in Valdez's glass. The camera closes up to show Max picking up a bottle with a candle on it. The candle falls into the glass. When the camera angle changes to show Valdez and Max, the candle is gone.
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.
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.
Revealing mistake: When Max crashes through the wall in the prologue, you can easily tell it's a stunt double. You don't even need freeze frame to see it, as the screen freezes, stylistically fades, then the title sequence starts.
Audio problem: When Max crashes through the wall, he exclaims "A Baby?!"; however, his lips don't move.
Character mistake: Max reads the convict number on Big Eddie's shirt to the Chief as 14783652. But when we saw the shirt earlier, the last 3 digits were 285, not 652.
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.
Ice Station Siegfried - S5-E13
Visible crew/equipment: Anytime the group of spies is walking out in the snow you can see the wall of the set that is supposed to look like fog.
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".
