Corrected entry: Niles says that after failing to confront Maris, he was turned away from the Oregon border check for having fruit in the car. Oregon is an interior state, and therefore without any form of border check. There might be a border check at the border with California, but Niles is approaching from Washington.
Corrected entry: Why can Niles hear what Frasier has said when he is inside the sensory deprivation tank? The whole point of these are that you cannot hear anything happening outside, so Frasier's ranting shouldn't have been heard inside. Similarly, why did the writers even have this scene with Frasier trying to talk to "Maris" when she was supposed to be inside it? Clearly they didn't quite know how soundproof they are.
Correction: The accusation that Niles could not hear Frasier because he was in a Sensory Deprivation Tank is completely false. Having owned one myself for many years it is true that you can not hear light sounds but if someone is talking loudly enough you can hear them and understand what they are saying to you. This is why earplugs are recommended for people wanting to experience Sensory Deprivation to full effect, as well as keep salt water out of your ears if you have ear problems.
Flour Child - S2-E4
Corrected entry: The Get Well Card that Frasier has to steal isn't musical at the start but is musical when he tries to return it to the hospital room.
Correction: Early on in the show, in Frasier's booth, Roz shows Frasier the card and it is musical. Frasier had to replace it but we must assume it is musical as well, as it is the same card.
Corrected entry: About 1/3 through the episode, they are in Roz's apartment. If you watch when people enter or leave the apartment, the door has a handle lockset. It also has a lock cylinder about 1 1/2 feet above it on both sides of the door. The problem is, the side of the door has no drill hole where the latch assembly should be: it's just solid wood. The lock isn't attached to anything that would enable it to work.
Correction: This is not a mistake. Often tenants install deadbolts and vacate without leaving a key, and it is quite common for the landlord to just remove the bolt assembly and patch the edge of the door. By leaving the lock in place, the landlord avoids having to replace the door, or repair a large hole through the door with 2 finished surfaces. If Roz had actually used a key in the lock, THAT would be a mistake.
Correction: Niles is referencing the very common USDA produce checkpoint that exists at points along the Washington/Oregon and Oregon/California borders.
I have never once encountered a produce check when entering Oregon from Washington. And Niles would have been on I-5, definitely no such check stations anywhere.