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.