When Randy discusses his suspicions about his mother getting married, he mentions that her new husband (Dalton Padron) is 37 years old. Yet in the next scene, when Monk examines Padron's visa application, his date of birth clearly reads "3/26/1960," indicating that he's almost 44 years old. Though he lied on the application about his marital status, Padron had no real reason to lie about his age.
In the cave-in, Sharona's purse goes from a right-side sling to a cross-body sling and back again while she clears the rocks.
Supposedly, each journal weighs more than a book of 600 pages, yet not even Monk notices when he first picks one up.
Each book is said to contain 30 oz. worth of gold, yet nobody seems to notice that a single journal weighs approx 2 pounds.
Adrian Monk says West Virginia became a state after the Civil War. West Virginia actually became a state in 1863, during the Civil War.
Sharona refers to Dalton (Nestor Carbonell) as "Mr. Dalton" incorrectly. She should have said "Mr. Padrone".