Continuity mistake: In Dalton's antique store, in the close of the forged map, the "sold" tag is covering part of the state names (mainly the West in West Virginia) and part of the picture. In the wide shot, the tag is now in the corner and not covering anything.
Continuity mistake: When Monk and Natalie fall off the bike the bike wheels are on the path. In the next shot they are on grass and the front wheel is at an angle, in the scene where they finish rolling down the hill the bike wheel is now straight.
Continuity mistake: When Monk and Natalie are getting out of their car at Max Hudson's house, there is a woman on the sidewalk walking past the house. As soon as Monk asks, "What station is he on?" the camera angle changes to a view from Max's porch, and said woman suddenly disappears, when she should be seen walking across the driveway. (00:07:55)
Continuity mistake: When Natalie is noticing Monk's nickname on his registration form, you can see a female extra with black hair, a gray outfit and a purse on her left shoulder walk past Natalie on the left side of the screen. Twenty seconds later, as Natalie is turning and preparing to walk away, the exact same female extra walks past her again, again going in the same direction. Also, in the same shot, you see a male extra with a satchel over his shoulder walk past the camera as Natalie is pulling the form from her purse, and he briefly and instantly reappears walking past Natalie again at the point where she grins and says, "I don't know!" for the second time. (00:05:25 - 00:06:10)
Continuity mistake: When Monk and Natalie are first talking to Kendra Frank, when Kendra says,"Look, they're trying to say he OD'd! Okay? That's impossible! He's been clean for 17 months! I know, I talked to him about it every day!" you can see that Monk has his right arm down by his side. But when the camera changes angle to Natalie replying,"Well, Kendra, we were there. We saw a needle in his arm," Monk's right hand goes from being by his side to scratching the side of his cheek with his finger. (00:13:10 - 00:14:35)
Continuity mistake: When the Captain and Randy are talking in the garage, in the shots over Randy's shoulder, the pad on his guitar strap is over his shoulder. In the shots from behind the captain, the pad is behind his back and can't be seen. (00:24:40)
Continuity mistake: During the brunch scene with Natalie's parents, the rolls in the bread bowl change position several times. In some shots, there are four, in others, there are five. They also go from being piled on top of each other to being arranged in the bowl and back several times. They're out of Monk's reach, so he's not just "making them even" either. (00:04:50 - 00:06:35)
Continuity mistake: When Mr. Monk is first arrested by the Sheriff, his arms are fully extended for the entire time that he is lying face down on the floor and his head is turned to one side. However, later on, Mr. Monk explains on the phone to Captain Leland Stottlemeyer how the Sheriff framed him. While the Sheriff is changing the gun barrels during Mr. Monk's explanation, you now see Mr. Monk with both of his hands behind his head and his head is now face down on the ground.