SpongeBob really wants Squidward to visit his house, but Squidward does not want to. He says that he prefers the comfort of his own home over SpongeBob's "dirty little hovel." SpongeBob then makes his house look exactly like Squidward's so Squidward will finally visit. Afterwards, he steals Squidward's vacuum cleaner, which makes Squidward come to take it back, which was Patrick's idea. Squidward puts his dinner in the oven and then comes to SpongeBob's house and sees the exact replica of his living room. He is a little annoyed. Squidward demands his vaccum, but SpongeBob ignores him, trying to do everything he can to ensure Squidward stays. Squidward sits on the exact replica of his chair and sees his coffee table, his food, his Art of the Clarinet book, and his pillow SpongeBob was fluffing. It looks like the one Squidward's Mother made for him. Then Squidward sees his hallway, and he sees the chip in the painting from when he moved into his own house. Then he walks into his bathroom. He sees his medicine cabinet and his rash cream. But when SpongeBob shows up, Squidward screams and he slips on the rash cream too many times and his head falls into the toilet, knocking himself out.
Squidward wakes up and thinks he had a dream about himself visiting SpongeBob, but to his horror, he isn't dreaming. Squidward screams to SpongeBob. He lies to SpongeBob that he has to go to the bathroom again, but instead, he runs upstairs, looking for his vacuum cleaner. When Squidward opens the door and turns on the light, he finds out he is in the gallery room and spots all 492 of his self-portraits hanging on the wall. Squidward becomes scared, but then he gets mad. He looks for the vacuum cleaner in the closet and finds it, but it is stuck in the closet. Squidward pulls it until his vacuum comes out. The vacuum hits Squidward and he crashes into the wall, tilting his self-portraits. He falls down the stairs, and he spits out the vacuum. He then walks out of SpongeBob's house, but when he goes outside, he realizes that his house had vaporized due to a fire. Squidward had forgotten to bring the casserole which was later on fire and caused Squidward's house to burn up. SpongeBob then tells Squidward to stay at his house. Squidward imagines what it would be like. He winds up staying at the pineapple with him indoors and SpongeBob and Gary sleeping outside.
SpongeBob and Squidward's shift ends in clear daylight in this episode, although in earlier episodes, such as "Pizza Delivery" and "Graveyard Shift," their shift ends close sun set. However, This may be a day with different hours or simply a longer day.
This is the first time Patrick and SpongeBob play jigsaw puzzles. The second time was in "Pineapple Fever."
Patrick said that Squidward visited his house only once.
In "Don't Look Now" he enters SpongeBob's home to scare him and Patrick, although they did not know it was him.
In "Sold!" Squidward enters SpongeBob and Patrick's house, although they did not know it was him until the end of the episode.
Squidward also claims that he has never called SpongeBob in this episode; however, in "Jellyfish Jam," he called to complain about the noise at SpongeBob's house, only for a jellyfish to pick up the phone.
Squidward said that the pepper went all over his imported rug, although only a tiny speck went on it.
In Germany, it was titled "Ein Besuch von Thaddäus" ("A Visit of Squidward.")
Normally, blancmange is white, but in this episode, it is purple and clear.
When Squidward saw his 492 self-portraits, one of them was a statue of Squidward, possibly the same from "Atlantis SquarePantis" since it had the leaf.
When Squidward saw his 492 self-portraits, the first one the camera directed on was a clown. In "Tentacle-Vision," the clown had no tears and had little x's on its eyes, but in this episode, the clown's eyes were open with no x's, and it had tears, and the nose was tear shaped just like Squidward's, but the clown's nose was red.
When Squidward went in SpongeBob's house, he did not see the kitchen, the garage, or the attic.
The episode's title card's background is the color of SpongeBob's house, while the wording is the color of Squidward's house.
SpongeBob invites Squidward to visit "La Casa de Esponja" and Bob Esponja is SpongeBob's Spanish name.
The time card said, "24 Hours Later," and would indicate that Squidward and SpongeBob have an extended shift the second day because the time card came some time after the shift of the first day.
When Squidward is getting his vacuum from the closet, there is a portrait where Squidward is painted naked, but with a back view so the viewer cannot see any revealing parts.
When Squidward is sad because his house is gone, the vacuum disappears; but when Squidward is about to fall, the vacuum reappears.
When Squidward enters SpongeBob's house, there is a portrait of another squid on the wall, but with an orange face and a blue shirt. However, when the camera pans in front of Squidward's face when he looks at SpongeBob's living room, the painting has a green face and a white shirt.
Most ovens aren't flammable, so unless they were really ancient, most ovens wouldn't have caught fire like Squidward's did. Even if Squidward's oven wasn't flammable, it is highly unlikely that it would have been able to set fire to Squidward's house that quickly.