Continuity: When Cora goes upstairs, her cat is curled up asleep in a chair. In the next, close-up shot, the cat is awake and sitting at the edge of the chair cushion, looking up at Monk with its front feet hanging over the side. When the shot cuts to wide angle again, kitty is instantly back in his original position, snoozing far from the edge and curled up against the pillows.

Factual error: It's late at night when Roger gets stung by hundreds of bees at the lookout point. But bees are diurnal (active only during the day). Unless something breaks into their hive, which doesn't happen here, they don't fly or swarm at night.

Factual error: Debbie's pet bird is called a parakeet, but it's a much larger exotic bird. It's unlike Monk, whose other OCD eccentricities and obscure knowledge are in full force despite his amnesia, not to know the difference. Monk may not know every rare species by name, but parakeets (aka budgerigars) are household pets common enough that anyone would know Debbie's bird isn't one. Monk definitely would have known.