Continuity mistake: In the opening sequence, the uniformed cop who finds toddler Tommy holding the severed finger bends down and says, "What've you got there, big guy?" In full shot, the cop is bare-handed. But when we cut to a close-up in the middle of his line, he's suddenly wearing a latex glove.
Continuity mistake: While Monk and co. question Vicky's roommate, two throw pillows behind her on the couch shift their orientations several times from shot to shot. The larger one also moves from the couch corner to a spot behind the woman's left arm and then back again. (00:14:00)
Continuity mistake: At the end, when Dale Biederbeck is screaming at Monk, Dale is sitting in his wheelchair with both his hands down in his lap. The shot cuts in the middle of his sentence, and suddenly he has one hand up on the cell bars. (00:40:30)
Continuity mistake: When Natalie comes into her house and realizes Monk is there (because he's reorganized the refrigerator), the first camera shot after she closes the refrigerator door shows a Tupperware container with a blue lid just to the right of the refrigerator (facing it) that is slightly turned so that is is not parallel to the refrigerator's side, and then just to the right of the container is a blender with the top lid off. When Randy shows up moments later, there is a camera shot that shows that the Tupperware is now square with the refrigerator's side, and it appears to be a different Tupperware than the first shot, as it looks bigger and appears to have more stored inside of it and it does not appear to have a blue lid. Also, the blender now has the top lid on it. In a third shot, the blender has now moved to the right at least 12 inches, which is confirmed while Natalie is preparing the smoothie: it can be seen that it has moved from its previous position and the blue topped Tupperware has returned. Finally, when Natalie starts to prepare the smoothie, the top of the blender is off and it is not ever seen that she removed the lid herself.
Continuity mistake: When the man with the letter from the Attorney General is telling Stottlemeyer not to 'screw it up', he is moving the letter in his hand. However, every time we see Stottlemeyer front on, there is a corner of the letter in the shot, and the letter remains stationary even while the other agent is moving it.
Continuity mistake: As Stottlemeyer steps off the stage, after singing, he is holding the microphone and pulls it down so that the top is pointed toward the floor but in shots following this, when he is talking to the woman, the microphone is back in an upright position.
Continuity mistake: The blood stains on Brad Terry's sweatshirt change positions after he runs back into the house. A few shots later, they're suddenly so faint they're barely visible at all anymore. Blood stains don't fade, at least not in just a few minutes.
Continuity mistake: Monk leaves his front door standing open in anticipation of his new friend's arrival. No one goes near the front hall, but when Hal gets there, he lets himself in by opening a door that has somehow closed itself. (00:10:30 - 00:11:50)
Continuity mistake: When the victim's niece is crying and Monk is quizzing her about the house, the position of her hands changes instantly several times as the camera reverses angles. She holds her hands to her face as she cries, for instance, but in the very next shot, her hands are down at her sides. Next cut, they're up to her face again. (00:09:00)
Continuity mistake: When Monk and Natalie are talking to Kemp in his office, the desk ornament and the cup of pencils that Monk keeps organizing change positions between shots. In the shots from Monk's side of the desk, the ornament is closer to the door. In the shots from Kemp's side, the pencil cup is closer. (00:09:40 - 00:11:20)
Continuity mistake: Monk empties a pocketful of pushpins onto the science teacher's counter top. One rolls to the very edge, separate from the others. A few minutes later, the stray pin is missing. Just before Monk and Natalie leave, however, it reappears on the counter edge.