Mr. Monk Gets Married - S2-E15
Factual error: Disher gets the armoire open and recoils from the smell of the dead body inside, despite it being wrapped in plastic. But he somehow didn't smell it before getting the door open, despite it providing hardly any protection from a smell like that.
Mr. Monk Falls In Love - S7-E6
Plot hole: It is not realistic that Miss Zladovic is confronted with the murder weapon for the first time in her flat after she had been arrested and interrogated about the same exact murder days before. It is also impossible that the police did not show her a picture of the murder victim as it is police standard to ask any suspects for connections/relations to "their" victim.
Mr. Monk and the Panic Room - S3-E2
Continuity mistake: When the Captain and Monk are standing in front of Randy's desk, there is no bag on the table. After a cut, a black bag suddenly appears and the Captain's hands are on it. (00:15:30)
Mr. Monk Makes A Friend - S5-E11
Continuity mistake: In the shot showing Monk, the playing cards in front of him are upside-down. When it switches to show Natalie, the cards are face-up. (00:33:00)
Mr. Monk and His Biggest Fan - S6-E1
Continuity mistake: When the lady that just "bought" Randy gives him his shirt you can see from behind that he closes one button of his shirt. But in the next shot 2 seconds later there are at least 5 buttons closed already.
Mr. Monk and the Leper - S5-E10
Continuity mistake: In the very last scene when Natalie leaves for her date, her flowers go from her hands, to the table, back to her hands, and then she sets them on the table.
Mr. Monk and the Man Who Shot Santa - S6-E10
Factual error: Michael Kenworthy and his robbery crew made plans to move to Ecuador after the heist. That wouldn't work because the United States has extradition agreements with every country in the western hemisphere.
Suggested correction: This is technically true, however, Ecuador is a relatively easy country for US expats to request political asylum in.
Mr. Monk Takes His Medicine - S3-E9
Factual error: The medication Monk is given is called Doxinyl, which is a real medication, but it's an antibiotic, nothing to do with OCD and certainly wouldn't cause the side effects shown.
Mr. Monk Paints His Masterpiece - S6-E14
Factual error: When Stottlemeyer and Randy are at the painter's daughter's home they find a picture showing him in front of Carson papers, which leads the Captain to say: they have a contract with the treasury, they are producing the paper for the U.S. currency. This is wrong: the treasury is not in charge of printing the Federal Reserve Notes. Rather it is the privately owned Fed that prints the Federal Reserve Notes and then lends it to the treasury at interest. And the interest added is the reason why there will never be enough money to pay the interest, i.e. the state debt.
Suggested correction: While the Federal Reserve is in charge of maintaining our currency (through the creation or destruction of currency, real or digital), the U.S. Department of Treasury is in fact responsible for printing money, through the Bureau of Engraving and Printing.
Mr. Monk Is on the Run (1) - S6-E15
Plot hole: The D.A. says that ballistics show that the bullet came from Monk's gun. The simplest thing to do would be to look at the gun, they'd know that it hadn't been fired and was full. With Monk's OCD we know it was cleaned, and the sheriff came in right after, so Monk couldn't have reloaded it. Yet they overlook all of this.
Mr. Monk and the Daredevil - S6-E7
Continuity mistake: During the fight with Harold's cousin Natalie's shoes are on and off her feet several times.
Mr. Monk and the 12th Man - S2-E9
Plot hole: Monk identifies the killer because of a shirt sleeve that gets ripped off... he noticed the button is sewed on in a unique manner with the threads parallel as opposed to the "standardized" crisscross pattern. The killer and Monk coincidentally use the same dry cleaner and Mrs. Ling sews buttons parallel because it's her style. Dialogue in the episode indicated she is the only one who sews buttons on like that. But I checked over 20 button up shirts here at my house and the ratio of crisscross to parallel button sewing methods is 50% of each - hardly some unique identification method.
Mr. Monk and the Panic Room - S3-E2
Factual error: The cops gain entry to the panic room to be faced with a chimp waving around a loaded handgun, apparently having shot a man, and shrug and make jokes about reading him his rights, instead of expressing the slightest concern that this animal might shoot them. Cops shoot remotely aggressive dogs all the time, but an ape with a gun doesn't even make them raise an eyebrow. Plus the police never did a gunshot residue test on the chimp. Standard procedure, and would've proven they didn't shoot.
Mr. Monk and the Wrong Man - S6-E8
Plot hole: Monk supposedly hears for the first time that Max was not carrying anything away from the crime scene when he speaks to the witness in front of the church. This leads him to conclude that there must have been a 2nd man with Max 14 years ago. But this does not make sense given that the witness with her photographic memory did not change her testimony and given Monks ability to observe and memorize details it is very unlikely that he did not come to that conclusion 14 years ago already. (00:32:45)
Plot hole: In this episode the police are using the toupee of the commissioner to identify the torso as the missing woman. In reality that would not be possible since cut hair is missing the root and therefore only contains mitochondrial DNA, which can only be used to identify a human's relation via the female lineage, as it is the same in relatives and passed through generations from the mother to her children. Furthermore, the identification of said torso would likely not be sufficient proof that Mr. Harley killed her as he may claim that somebody misled him to believe she was in Paris by placing the telephone call he mentioned to police.
Mr. Monk Gets Cabin Fever - S3-E12
Other mistake: Kathy says "I'm going to get me one of those new Le Barons." Chrysler discontinued the Le Baron in 1995. Since the episode is from 2005, she should have said Sebring.
Mr. Monk and the Panic Room - S3-E2
Continuity mistake: Just after the Captain presses the button to open the panic room door, his arms are both down. When it cuts to a shot looking at him from inside the panic room, his left arm is up against the door. (00:14:10)
Mr. Monk and the Employee of the Month - S3-E7
Audio problem: The audio of the victim screaming is repeated. The "Oh! Help! Help!" sounds the same twice. (00:02:05)
Other mistake: During the flashback of the perpetrator beating up the victim with a baseball bat, the shot is visibly spliced and there's a jump cut while he is between swings of the bat. (00:32:50)
Continuity mistake: The exterior of Monk's apartment building looks completely different in various episodes.