Mr. Monk and the Genius - S7-E2
Factual error: On the chessboard, both kings are in check, which is an impossible position in chess. (00:15:40)
Mr. Monk Goes to a Fashion Show - S4-E10
Revealing mistake: The fan letter Monk wrote to shirt Inspector 8, shown in close-up where it hangs on her work station wall, consists of the same paragraph printed out twice. (00:06:45)
Mr. Monk Meets His Dad - S5-E9
Plot hole: Monk's dad, Jack, drives an 18 wheeler. In the scene where Jack pulls over to the side of the mountain road so they can discuss specifics about the GPS, a brake line is shown breaking and spurting what I assume is meant to be brake fluid. The rig then rolls down the mountain. However, 18 wheelers don't have brake fluid since they don't have hydraulic brakes, they have air brakes. Even if the rig lost its brakes due to loss of air pressure, the brakes are spring loaded to lock up all the wheels in this case and prevent movement. That's how you set the parking brakes, by releasing the air pressure. In other words, if he has air, he can use his application brakes; if he's lost air, he has his parking brakes set. Rigs that lose their brakes going down steep grades do so due to extreme overheating, causing brake fade, an inability of the brake shoes to grab the brake drums. This wouldn't have happened while they were parked.
Mr. Monk Is on the Run (1) - S6-E15
Continuity mistake: When Monk attempts to steal the truck at the gas station and grabs the sleeping driver's keys, he drives the truck in circles and then stops. When he stops, the truck is exactly parallel to the end of the concrete slab where the gas pumps are located. However, when the police arrive, the truck is now at a different angle with the back of the truck now being closer to the end of the concrete slab than the front. The gas station attendant would not have moved the truck himself as the police would have told him not to touch anything at the scene.
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 Goes to Jail - S2-E16
Factual error: There are a number of unrealistic situations portrayed inside the prison: 1) An inmate scheduled to be executed in less than an hour would not be left so unattended as to require the trustee to yell for help when he went into distress, or to allow the inmate and trustee to exchange objects. 2) A chronic rule-breaker like Spyder, who had just "put a guy's head through a wall," would not have gotten just one day in solitary confinement with no other loss of privileges. 3) The neo-Nazis would not be allowed to wear swastika lapel pins. 4) Death row inmates are not served their last meal by unescorted fellow prisoners.
Mr. Monk Is At Your Service - S5-E12
Visible crew/equipment: In the scene where Natalie arrives to the dinner party "pregnant" and Mr. Monk is going to "help her with her coat" there is a female crew member on the other side of the sliding door (to the left of the door). (00:31:25)
Mr. Monk and the Really, Really Dead Guy - S5-E15
Factual error: The FBI agent runs a computer check and prints out a list of all the pet stores in San Francisco selling ferrets. But he shouldn't have been able to generate any list at all. Pet ferrets are illegal in the state of California, and are not sold in pet stores there. (00:15:00)
Mr. Monk and the Astronaut - S4-E14
Plot hole: The whole plot hinges on Steve Wagner knocking the victim out for 2 days, remotely hanging her while he's in space, then removing the hanging machine when he lands. But keeping someone unconscious chemically for 2 DAYS is a hell of a feat. And unpleasant though it is, she'd be voiding her bowels over those 2 days, leaving a serious mess, plus all the chemicals necessary to keep her unconscious would be found in an autopsy.
Mr. Monk Gets Cabin Fever - S3-E12
Audio problem: At the start, the car stops at the gas station (weirdly far from the pumps, for a start). Grooms talks to Monk then walks to the back holding the nozzle, stretching the hose taut, despite no filler cap on that side of the car. We cut to Monk, and we hear a clunk of Grooms attaching the nozzle (to what?). Later Grooms is still holding the nozzle, and as Monk goes inside Grooms is just wandering around aimlessly holding it.
Mr. Monk and the Very, Very Old Man - S2-E5
Continuity mistake: When his wife visits Stottlemeyer in his office he fills the running waterfall with coffee, but later in that scene when he holds her hand to promise her that he will investigate the the old man's death the waterfall is empty again. (00:04:40 - 00:07:10)
Mr. Monk's Other Brother - S7-E10
Other mistake: During gunfire exchange, Jack's gun locks back, indicating it is empty. He then fires 2 more shots out of an empty gun. (00:37:20)
Mr. Monk and the Garbage Strike - S5-E2
Factual error: While Monk and Natalie are waiting for the mayor to exit City Hall with his aide, you can see a cable car turning around the corner behind them. San Francisco City Hall is located on Van Ness Avenue between Grove and McAllister Streets, and this is at least six blocks from the nearest cable car line (which would be the turntable at Powell and Market Streets). (00:20:00 - 00:26:05)
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 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 Herring - S3-E10
Continuity mistake: When Natalie puts out the fire with the extinguisher, the nozzle is still pushed down when she uses it, but when she puts it on the table, in the next shot the nozzle is fully extended. There are a number of times during the scene, when Monk is trying to figure out how to use it, where the nozzle's position keeps changing between shots.
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 Sleeping Suspect - S2-E7
Deliberate mistake: All the mail bombs are delivered in packages tied with knotted string. The USPO hasn't allowed string-tied packages since the mid-90s (they get caught in automated equipment), but since the knots were crucial to ID-ing the suspect in this episode, that fact had to be ignored.
Mr. Monk and the Man Who Shot Santa - S6-E10
Continuity mistake: At the end, the glass of egg nog Julie and Natalie leave on the floor disappears after they stand up to talk to Monk. (00:40:40)
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.
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.