Mr. Monk Takes Manhattan - S3-E1
Continuity mistake: The angle of one of the victims' heads visibly changes from shot to shot while Monk is investigating the scene. (00:05:30 - 00:06:25)
Mr. Monk Gets Stuck in Traffic - S3-E13
Continuity mistake: When Monk is talking to Daniel on the radio, in the shots from inside the truck, Krystal is standing next to the open door, to Monk's left when he turns to face her. In the shots from outside the truck, Krystal is now away from the door and to Monk's right.
Mr. Monk Gets Stuck in Traffic - S3-E13
Revealing mistake: When we see a shot of Steve in his car while in the dump truck, it's shot in a studio and the shot is reused each time we see Steve in the car. The shadow is completely different and at one point, when they show Steve in the car with the car and truck bouncing around, you can tell the image is just shaken, rather than the dump truck actually bouncing. There are loose chains hanging off the inside walls that don't move or sway at all.
Mr. Monk Gets Cabin Fever - S3-E12
Continuity mistake: When Natalie opens the captain's smashed cake in the van it is vanilla, but when she gives it to the captain he grabs some with his fingers to eat and it's chocolate with only a bit of vanilla. (00:28:40)
Mr. Monk Takes Manhattan - S3-E1
Continuity mistake: There is a shot where Randy is trying to cross the police tape and an officer stops him, and he can be seen briefly arguing. However, when it cuts to the next shot, we see that argument happening again in the background, repeated. (00:07:20)
Mr. Monk and the Red Herring - S3-E10
Audio problem: In the last line of the episode, the end of the word "spider" that Natalie is saying is cut off. It sounds like "spi." (00:42:05)
Suggested correction: I just watched the scene and I hear the whole word "spider."
Mr. Monk Takes Manhattan - S3-E1
Audio problem: The captain can be seen speaking, but no audio of him is heard. (00:14:10)
Mr. Monk Takes Manhattan - S3-E1
Revealing mistake: Monk's reaction to the gunshots begins just before the gunshots go off. (00:03:55)
Mr. Monk and the Game Show - S3-E8
Continuity mistake: When Monk visits Natalie's home, he stops in her room and the door opens left to right. At the end when he goes in her room again, the door opens right to left.