Audio problem: When Max is freed from the chains and punches the biker, he misses the punch completely, but the guy falls over.
Revealing mistake: When Max writes down the code and hands it to Hercules, the paper is blank the entire time.
Other mistake: Max collapses and spills the antidote on the floor, but there are no wet marks when the Chief bursts into the room.
Audio problem: When in the apartment of the doctor, it is raining, but there's no sound from the rain hitting the building.
Suggested correction: I've been in several different buildings where I can't hear the rain. Even in my own home there's times I can't hear the rain, even though other times I can.
Continuity mistake: When confronted by Siegfried in the restaurant, the position of Siegfried's gun compared to Max's head changes constantly between shots with no time to move.
Visible crew/equipment: When Siegfried throws the cup into the air and Doctor T holds it up with his force field, a wire is visible holding the cup in the air.
When Good Fellows Get Together - S3-E8
Revealing mistake: In the final scene when Hymie is fighting Groppo, Hymie is a blatant stunt double in several shots, evidenced by the different shaped head of the double.
Plot hole: Doctor Yes' execution trap involves a booth flooding with water, drowning the occupant, and the water pushes a float upwards, eliminating another via a spinning blade. However, several times the float reaches the top of the booth, and the spinning blade doesn't kill anyone. There's also a breathing space at the top of the booth, so people couldn't drown in there.
That Old Gang of Mine - S3-E10
Revealing mistake: When Max is scaling the wall into the palace, in one shot he is a visible stunt double.
Revealing mistake: When Max, the Chief and 99 are going through the wreckage, Max picks up solid wood that's obviously polystyrene.
Continuity mistake: At the car wash, the KAOS man drives his car in and there are two people in it for some reason, but when he gets out, he's the only one there.
Revealing mistake: The lift for going in and out of the KAOS base is meant to be sturdy metal, but it wobbles like a prop when the KAOS agent drives off it.
Continuity mistake: During one scene in the fake plane going off, a KAOS thug standing in the background has a shadow that magically moves between shots.
Other mistake: During the scene in the prison cell, the first shot has a hair sticking to the bottom right of the screen the entire time.
Other mistake: In one of the car wash fight scenes, two men accidentally kill one another. According to the angle of one of the guns, you can kill someone without actually hitting them.
Continuity mistake: In one shot, both Max and the guy holding him at gunpoint are covered in soap suds, but the next shot shows that only Max is covered.
Maxwell Smart, Private Eye - S3-E5
Revealing mistake: When Max and Trinka jump into the taxi at the start, the cab is in park position for the entire chase scene.
Maxwell Smart, Private Eye - S3-E5
Continuity mistake: At one point in the chase, the black car goes past a corner too fast and backs up so they can go through the street. When the random guy hails the taxi, the black car is reversing again in the background.
Maxwell Smart, Private Eye - S3-E5
Factual error: A revolver generally only holds six bullets, but 99's gun fires way more without reloading at any point.
Maxwell Smart, Private Eye - S3-E5
Other mistake: At the Alledon Arms shootout scene, an agent sneaks behind Max and Max shoots him dead, but at the angle that Max fired, the bullet would have hit the concrete, not the man.