The Spy Who Met Himself - S3-E1
Revealing mistake: When the fake Chief calls Max over to the car, the driver is meant to be a double of Smart, but the driver is not Don Adams.
The Spy Who Met Himself - S3-E1
Other mistake: During the fight scene at the airport, Smart grabs a handful of soil from a nearby potted plant... Which has no plant in it and is just a random pot of soil in the middle of an airport.
The Spy Who Met Himself - S3-E1
Audio problem: When Max hits the real 13, he misses the punch completely.
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.