Continuity mistake: When Monk is in the review board hearing, in long shots, the wastebasket by the board members' table is empty. When one of the reviewers throws away a paper that misses the basket and lands right next to it, there are several papers already in it. In the next long shot and for the rest of the scene, the basket is empty again and the missed paper is at least two feet away. (00:06:15 - 00:07:40)
Continuity mistake: The location of Trudy's grave changes throughout the series. In "Mr. Monk and the Candidate," it's in a spot in the graveyard by a paved intersection. In "Mr. Monk and the Red-Headed Stranger," it's in the midst of a copse of trees. In "Mr. Monk and the Three Pies," it's just off the cemetery's main drive.
Continuity mistake: In the scene where Capt Stottlemeyer is vacuuming Monk's floor, you see the living room has wall-to-wall carpet. But just minutes later when they show the floor again, it is just a throw rug over hardwood floors. The room no longer has wall-to-wall carpet.
Continuity mistake: After Monk tries to get out of the contract with Murderuss, he walks to Stottlemeyer with jewel necklaces around his neck. In the next shot (after Stottlemeyer asks "How did that happen?"), the necklaces have disappeared. (The golden teeth stay, though).
Continuity mistake: When Monk pulls all his drapes shut, there's a wide gap in the right hand set that's letting at least five inches of bright sunlight through. No one has touched them again, but when Natalie goes to open the drapes a few moments later, the gap has completely closed itself. (00:16:00)
Continuity mistake: When Monk is trying to convince the old woman to use the other pen so the ink in them will be even, in the shots from behind him, the pen's chain is hanging down below the counter. In the shots from in front of him, the chain is pulled taught. (00:23:45 - 00:24:15)
Continuity mistake: Stottlemeyer has taken things like a banana and a Monkey Joe out of a black leather bag and places them on a table while interrogating Darwin the chimp. One shot while he's acting like a monkey shows the table's bare and the bag's closed.
Continuity mistake: In the beginning scene it shows someone injecting a liquid, with ease, into what appears to be a corked wine bottle. Then around the 13-min mark you see the Captain re-gift the bottle and when the person opens it, it's a pull cork with a hard top, something a needle would not easily go through. (00:00:10 - 00:13:23)
Continuity mistake: When Ruskin and Monk are tussling with each other, the gun falls onto the wipers, with the barrel touching the wiper and handle up. The next time we see the gun, the handle is down and touching the wiper. It keeps flipping back and forth in various shots.