Mr. Monk Meets Dale the Whale - S1-E4
Revealing mistake: When Monk is showing how Dale and his Doctor murdered the judge one can see that the knitting of the right chair is already cut to ensure that the policeman will fall through it when he later steps on it.
Mr. Monk and the Billionaire Mugger - S1-E7
Continuity mistake: When Sharon asks Sydney's old flame about the mugging 20 years ago, the glasses in front of them are full when they are being filmed from behind Sydney's ex, then are half empty being shown from behind Sharon, and in the next shot they are full again. (00:32:00)
Mr. Monk Goes to the Asylum - S1-E6
Continuity mistake: The doctor says that Mr. Monk is allergic to tomatoes. In another episode Mr. Monk makes a sandwich with tomato. There is another episode in which Mr Monk is excited about square tomatoes.
Mr. Monk and the Red-Headed Stranger - S1-E12
Revealing mistake: In the scene where a man is streaking, he is carefully made to look naked. But when he is running through the park, there is one shot where you can see some black underwear.
Mr. Monk and the Red-Headed Stranger - S1-E12
Continuity mistake: In the closing scene with Willie Nelson, there are a few times when the clarinet music changes notes, yet Monk's fingers do not move. There is also one point where Monk takes a breath mid-note.
Mr. Monk and the Red-Headed Stranger - S1-E12
Continuity mistake: In the scene where Willie Nelson is rehearsing, his pigtails change position depending on the shot.
Mr. Monk and the Earthquake - S1-E11
Continuity mistake: Sharona tells her sister that Monk needs the guest room because he "doesn't sleep on couches," but in "Mr. Monk and the Marathon Man," she had to stop him from taking a nap on the victim's couch. (00:15:15)
Mr. Monk Goes to the Asylum - S1-E6
Plot hole: Monk and Manny go on the roof through Manny's window to grab a piece of cloth. Due to the possibility of suicide, it is highly unlikely that an asylum would have a window that goes directly to the roof, unlocked.
Mr. Monk Goes to the Asylum - S1-E6
Factual error: The woman who accuses Monk of stealing her necklace shouldn't have the necklace inside the asylum in the first place. For both safety and insurance reasons, patients in mental facilities aren't permitted to keep any potentially harmful jewelry, including pins, broaches, earrings, belts, beads and necklaces.
Mr. Monk and the Earthquake - S1-E11
Continuity mistake: After the quake, all but one of the art pieces have fallen out of the Rutherford's display case and lie shattered on the floor. But seconds later, when Christine pushes the cabinet over, most of the broken items have vanished from the floor. (00:02:30)
Mr. Monk and the Billionaire Mugger - S1-E7
Continuity mistake: It's spring in San Francisco in this episode: warm with light rain and people outside in shirtsleeves. That is, until Monk goes to visit Kelly, when it suddenly becomes winter. Everyone's bundled in heavy coats and it's sleeting. After Monk leaves Kelly's house, it becomes spring again. [The Kelly Street sequence was originally meant to be used in "Mr. Monk and the Candidate, " where everyone is dressed appropriately for cold weather. For whatever reason, it instead got used in this episode.]
Mr. Monk and the Earthquake - S1-E11
Audio problem: Sharona and Benjy are forbidden access to their damaged apartment building. The policeman tells them to call a certain emergency number, but when he says this, his lips aren't moving. (00:11:00)
Mr. Monk and the Earthquake - S1-E11
Continuity mistake: When Sharona and her sister are talking on the couch, her sister is playing with her hair when she asks "Are you in love with anybody?" The shot changes to Sharona answering from over her sister's shoulder and her sister's hand is in a fist and pressed against her head. (00:16:00)
Mr. Monk and the Billionaire Mugger - S1-E7
Continuity mistake: In the opening scene, Archie Modine pulls the revolver on Sidney Teal with his right hand and fires one shot. The camera angle changes as the remaining shots are fired and Modine now has the gun in his left hand and is standing in a completely different stance. During the recap of the crime at the end of the episode, Modine fires every shot with his right hand.
Mr. Monk Takes a Vacation - S1-E10
Continuity mistake: When Sharona is having dinner at the restaurant and asks her date, "Have you ever been married?", she puts down her drink and lets go of it. When the shot changes she is putting the glass down again and holding on. In the third shot her arms are folded.
Mr. Monk Goes to the Carnival - S1-E5
Plot hole: It makes no sense why the police haven't done the most obvious thing and checked for fingerprints on the murder weapon (the knife). It would not only back up the detective's claim that he did not stab the victim (he never touched the knife) but would have given the police a major clue to finding and prosecuting the murderer.
Mr. Monk and the Red-Headed Stranger - S1-E12
Continuity mistake: Before meeting Willie Nelson on his tour bus, Monk is outside the radio station. When a car comes past the shot shows from inside the car and we see Monk putting his right hand up to his forehead and touching it. In the next shot his hand is now further down his face and is not touching it anymore.
Mr. Monk and the Candidate (1) - S1-E1
Factual error: When the rifle is identified as a "Weatherby Fibermark", Monk and Randy say it's a British rifle. But Weatherby is an American company.
Mr. Monk and the Airplane - S1-E13
Factual error: When the flight attendant announces that "they have been asked to return to the gate" the French pilot and his mistress are already celebrating with a glass of wine, but that is impossible since drinks are only served after the take off phase when the plane has reached its traveling altitude. (00:41:15)
Mr. Monk and the Candidate (1) - S1-E1
Character mistake: When Captain Stottlemeyer is saying that the two murders are unrelated, he says, "He was stabbed, she was shot," when the truth is the exact opposite.
Answer: Notice also that in the opening credits scene when he is touching parking meters her also wipes his hand on his clothes each time he does it.