Mr. Monk Meets His Dad - S5-E9
Deliberate mistake: In the opening scene, Wood's tie is grabbed by an exposed fan belt located above the side of the engine. However, this belt/pulley assembly doesn't exist in a real truck's engine compartment - the fan belts are all in front of the engine, where the camera can't see them easily. The prop master must have added this dangerous device to the truck to allow the camera to see the strangulation.
Mr. Monk Meets His Dad - S5-E9
Other mistake: When Jack Monk is filling up his truck, the numbers on the pump don't add up right and keep changing. The cost is $3.599/gallon, but in one shot you see the sale price reads $93.78 for 28.348 gallons. The sale price should be $102.02. But in a later shot, he's only pumped 27.126 gallons. Then when he hits $100 sale price, it's for 31.259 gallons ($3.199/gallon) but in the next shot it reads 27.719 gallons.
Mr. Monk Meets His Dad - S5-E9
Continuity mistake: When Monk is looking through the boxes on the trailer, on the first shot, the box marked "Tucson" isn't flush with the box underneath. But after, it's flush without anyone touching it.
Mr. Monk Meets His Dad - S5-E9
Factual error: The runaway truck ramp has no advance signage (e.g. Runaway Truck Ramp Ahead 1/2 Mile) as real runaway truck ramps do. It has no loose sand to slow down the truck's wheels. And it doesn't point uphill as a real ramp would.
Mr. Monk Meets His Dad - S5-E9
Visible crew/equipment: When Monk and his dad pull over to a diner there are visible feet behind the truck.
Mr. Monk Meets His Dad - S5-E9
Character mistake: At some point Monk asks his father what the device in the car is. His dad tells him it's a GPS. It's difficult to believe that our detective doesn't recognize the machine, even if it's probably another model: the whole plot of the episode 2x03, Mr. Monk Goes to the Ballgame, revolves around a tampered-with GPS.
Mr. Monk and the Leper - S5-E10
Continuity mistake: While Dr. Polanski talks to Monk and Natalie in his waiting room, he's gesturing with both hands held out in front of him. When the shot changes angles, he's abruptly standing with his hands clasped behind his back. Next cut, he's gesturing again. (00:05:00)
Mr. Monk and the Leper - S5-E10
Continuity mistake: Monk uses paper towels to grab the phone, dragging a length of white paper across the kitchen counter and leaving it there. But when he turns around to talk to Natalie, the counter behind him is bare. The paper towel trail has vanished. (00:05:40)
Mr. Monk and the Leper - S5-E10
Continuity mistake: Randy is desperately trying to pry his teenage acne photo off the doctor's wall. He knocks the photo underneath it crooked, but it rights itself in the next shot. Then he pulls his picture free, making a large hole in the wall, but knocks all the surrounding photos off onto the floor. There's no time lapse, but when he turns around, the fallen photos have all put themselves neatly back up on the wall, and the hole is gone. (00:32:30)
Mr. Monk and the Leper - S5-E10
Continuity mistake: When the body falls out of the balloon gondola, the weights that were securely tied to it have disappeared. The corpse also changes positions on the ground between shots, even though no one has touched it. (00:37:30)
Mr. Monk and the Leper - S5-E10
Continuity mistake: In the final scene, the pillows on Natalie's couch keep shifting positions between shots, from straight to crooked and back again. (00:40:30)
Mr. Monk and the Leper - S5-E10
Revealing mistake: When the balloon goes over the cliff, a very obvious dummy replaces Monk.
Mr. Monk and the Leper - S5-E10
Revealing mistake: Look at the stuntman who stands in for Tony Shalhoub when the balloon crashes and the basket scrapes and bumps along the ground. He is about fifty pounds lighter than Shalhoub, looks nothing at all like him and his hair looks like a Harpo Marx fright wig dyed black.
Mr. Monk and the Leper - S5-E10
Revealing mistake: When Monk is hanging from the cliff, in the shots looking down at Monk you can see the ocean through him.
Mr. Monk and the Leper - S5-E10
Continuity mistake: At the meeting, the pencils on the yellow pad on the table keep changing position depending on the camera angle.
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 Makes A Friend - S5-E11
Continuity mistake: When the murderer strangles his victim, her music box is dropped on the floor several feet away. Though no one has touched it, the music box is somehow lying only a few inches from her body when the police arrive to investigate. (00:01:20 - 00:04:40)
Mr. Monk Makes A Friend - S5-E11
Continuity mistake: When Natalie quizzes Monk on the finer points of ice hockey, a blue teapot sitting on the kitchen island beside her moves itself back and forth several inches between takes. (00:10:30)
Mr. Monk Makes A Friend - S5-E11
Continuity mistake: Monk leaves his front door standing open in anticipation of his new friend's arrival. No one goes near the front hall, but when Hal gets there, he lets himself in by opening a door that has somehow closed itself. (00:10:30 - 00:11:50)
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)