In the final scene, the same few extras can be seen repeatedly walking toward the camera past the two speaking characters but don't reappear walking away in the next (opposite) shot as expected. One extra, a woman in black wearing sunglasses, comes from the same direction into the shot more than once, and walks into the frame from both directions toward the camera.
In the beginning of Mr. Monk and the Other Woman (2002), the assailant stabs the attorney, yet when he is digging through the files, there is no blood on his gloves.
When Monica Waters calls Mr. Monk and they go to her house, Mr. Monk is sitting in the back of Sharona's car. He has a thing against riding in the back of cars as shown many different times.