Mr. Monk Goes to the Bank - S6-E12
Factual error: Banks never use combination locks. A four-digit lock, like the one used here, would take a patient thief about six hours to open by trying every possible combination, and banks really do take such unlikely scenarios into account. The wall panel in the bank would be secured by two padlocks, with no one person holding both keys.
Mr. Monk Goes to the Bank - S6-E12
Factual error: An intelligent, experienced police officer like Stottlemeyer would know perfectly well that shooting a lock will not open it – that's purely a Hollywood myth. Not only would shooting the lock probably jam it, but the ricochet in a closed room like a bank safe could easily kill someone.
Mr. Monk and the Rapper - S6-E2
Factual error: Extra Large was killed Sunday morning of Daylight Saving's Day. But the paper they show Monk is dated Friday, May 4, 2007. But Daylight Saving was March 11, 2007.
Mr. Monk and the Three Julies - S6-E13
Factual error: Monk deflects the policeman's rifle shot and the bullet hits Stottlemeyer's car. But the gun fires just as Monk pushes it aside, and the car is behind them. There's nothing that could deflect the bullet back toward them, so at that angle, there's no way the shot could have struck the car. (00:35:50)
Mr. Monk Is Up All Night - S6-E9
Factual error: [SPOILER ALERT] At the end of the episode, it is revealed that the mysterious cab driver had corneal transplants to repair damage to her vision from Retinitis Pigmentosa. RP is a defect of the retina, in the back of the eye, which accumulates pigment, losing its photoreceptivity, resulting in vision loss. A corneal transplant will not restore vision to someone with RP.
Mr. Monk and the Naked Man - S6-E3
Factual error: While the police are investigating the murder at the start of the episode, the police make numerous mistakes with the crime scene. First there is no sheet over the body and/or tent to cover the body. Being they are on a beach it would make sense to cover the body from any debris or sand disturbing the body. Second, the sun is shining brightly would not help with preserving the body for the coroner. Finally why have the police only cordoned off a small area around the body. Being a crime scene and potential evidence could be found it makes little sense why they wouldn't cordon off the beach or most of it from the public.
Mr. Monk Is on the Run (2) - S6-E16
Factual error: When Captain Leland Stottlemeyer looks at the postcard that Mr. Monk sent to him, the address shown is for the city of San Francisco with a zip code of 90019. This zip code is for the city of Los Angeles. The actual zip code for the address shown, after checking with the U.S. Postal Service website, is 94105. (00:07:50)
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 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.