*As [[Lisa]] chases her hamster, the house has more doors than normal.
*As [[Lisa]] chases her hamster, the house has more doors than normal.
*When [[Bart]] arrives at the entrance, it is not raining outside. But later, it is raining again.
*When [[Bart]] arrives at the entrance, it is not raining outside. But later, it is raining again.
−
*Homer technically didn't spill the beans about Lenny's surprise.
+
*[[File:Nowindow.jpg|thumb|The window is missing]]Homer technically didn't spill the beans about Lenny's surprise.
*When Homer sits on [[Lenny Leonard|Lenny]]'s bar stool cake, the outside cover is red. But later, it is light red.
*When Homer sits on [[Lenny Leonard|Lenny]]'s bar stool cake, the outside cover is red. But later, it is light red.
*Why would they place the cake on the floor without a plate under it? ''It would probably give away the fact it was a cake.''
*Why would they place the cake on the floor without a plate under it? ''It would probably give away the fact it was a cake.''
−
* When Homer's painted portrait of an angry Marge is seen on the house, the living room's window is missing.
+
* [[File:Purplecar.jpg|thumb|Homer's car is a brighter and darker purple]]When Homer's painted portrait of an angry Marge is seen on the house, the living room's window is missing.
−
*[[Pink Sedan|Homer's car]] is in a different shade of pink-purple in the Simpson house shot seen at the beginning of Act 2.
+
*[[Pink Sedan|Homer's car]] is in a brighter and darker shade of pink-purple than usual in the Simpson house shot seen at the beginning of Act 2.
−
*When Homer calls "Ray" to save him from the mental hospital's medical restraint, Dr. Hibbert's eyebrows are missing. Later, after Bart tells Homer that he only saw him talking to himself, Dr. Hibbert's eyebrows are colored in.
+
*[[File:Nobrow2.jpg|thumb|Dr. Hibbert without eyebrows]]When Homer calls "Ray" to save him from the mental hospital's medical restraint, Dr. Hibbert's eyebrows are missing. Later, after Bart tells Homer that he only saw him talking to himself, Dr. Hibbert's eyebrows are colored in.
**However, near the end, when the [[Simpson family]], [[Ned Flanders|Ned]], [[Julius Hibbert|Dr. Hibbert]] and [[Ray Magini|Ray]] laugh, Dr. Hibbert's eyebrows are missing again.
**However, near the end, when the [[Simpson family]], [[Ned Flanders|Ned]], [[Julius Hibbert|Dr. Hibbert]] and [[Ray Magini|Ray]] laugh, Dr. Hibbert's eyebrows are missing again.
*When the family (except Homer) arrive at the [[Calmwood Mental Hospital]] to check on Homer, there is no building in front of it. But when the Simpson family, Ned and Dr. Hibbert visit Homer in his patient room, the [[744 Evergreen Terrace|Flanders house]] is in front of it with Ray on the roof, as seen in the patient room window. ''The Flanders house might've been so far away from the mental hospital that the house can be seen from the hospital.''
*When the family (except Homer) arrive at the [[Calmwood Mental Hospital]] to check on Homer, there is no building in front of it. But when the Simpson family, Ned and Dr. Hibbert visit Homer in his patient room, the [[744 Evergreen Terrace|Flanders house]] is in front of it with Ray on the roof, as seen in the patient room window. ''The Flanders house might've been so far away from the mental hospital that the house can be seen from the hospital.''
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*When Stephen Hawking explains how Bart couldn't see Ray at [[Builders' Barn]], the flashback does not show a ladder behind Ray. In the original scene, there was a ladder behind him.
*When Stephen Hawking explains how Bart couldn't see Ray at [[Builders' Barn]], the flashback does not show a ladder behind Ray. In the original scene, there was a ladder behind him.
*The gravitational lens created by the black hole should have absorbed the light of other stuff that was near Ray and Homer.
*The gravitational lens created by the black hole should have absorbed the light of other stuff that was near Ray and Homer.
−
*During the [[Opening Sequence|opening sequence]], the subtitles underneath the title card has the words, "350th EPISODE, MAN!", even though [[Don't Fear the Roofer]] is actually the 351st episode in both production and broadcast order. [[Future-Drama]], which is the 350th episode to air in broadcast order ([[The Father, the Son and the Holy Guest Star]] is the 350th episode in production order), could've used those subtitles in the title card.
+
*[[File:Signone.jpg|thumb|Moe's without its sign]]During the [[Opening Sequence|opening sequence]], the subtitles underneath the title card has the words, "350th EPISODE, MAN!", even though [[Don't Fear the Roofer]] is actually the 351st episode in both production and broadcast order. [[Future-Drama]], which is the 350th episode to air in broadcast order ([[The Father, the Son and the Holy Guest Star]] is the 350th episode in production order), could've used those subtitles in the title card.
*When Homer walks by Moe's Tavern in the rain while talking to himself, in an overhead view, the "Moe's" sign is gone. But, when just before Homer enters the bar, the "Moe's" sign is there.
*When Homer walks by Moe's Tavern in the rain while talking to himself, in an overhead view, the "Moe's" sign is gone. But, when just before Homer enters the bar, the "Moe's" sign is there.
This is the 350th episode (despite being the 351st to air). Originally, The Heartbroke Kid was meant to be the 350th, but they were switched, making Future-Drama (actually The Father, the Son and the Holy Guest Star, which is the 350th in production order, and was going to air on April 10, 2005, but was postponed to May 15th as the season finale, so a rerun of On a Clear Day I Can't See My Sister was aired instead on April 10th due to the death of Pope John Paul II eight days earlier) the 350th in broadcast order and The Heartbroke Kid the 352nd in both production and broadcast order.
This episode aired a week before guest star Ray Romano's own television series, Everybody Loves Raymond, had its series finale, which Ray mentions during a confusing argument.
This episode originally aired on the same date as the next episode, "The Heartbroke Kid", which aired right after this episode. This is the first time that two new episodes aired on the same day.
Cultural References
The title of this episode is a spoof on the rock hit "(Don't Fear) The Reaper" by the band Blue Öyster Cult.
"Knockers" is an obvious spoof of "Hooters", even using the same type of font style and color.
Krusty's five-o-clock shadow is colored in dark pink.
When Marge wakes up by the leak, it is nighttime. However, when Homer fixes the leak with the Hot Wheels track, it is daytime.
As Lisa chases her hamster, the house has more doors than normal.
When Bart arrives at the entrance, it is not raining outside. But later, it is raining again.
The window is missing
Homer technically didn't spill the beans about Lenny's surprise.
When Homer sits on Lenny's bar stool cake, the outside cover is red. But later, it is light red.
Why would they place the cake on the floor without a plate under it? It would probably give away the fact it was a cake.
Homer's car is a brighter and darker purple
When Homer's painted portrait of an angry Marge is seen on the house, the living room's window is missing.
Homer's car is in a brighter and darker shade of pink-purple than usual in the Simpson house shot seen at the beginning of Act 2.
Dr. Hibbert without eyebrows
When Homer calls "Ray" to save him from the mental hospital's medical restraint, Dr. Hibbert's eyebrows are missing. Later, after Bart tells Homer that he only saw him talking to himself, Dr. Hibbert's eyebrows are colored in.
When the family (except Homer) arrive at the Calmwood Mental Hospital to check on Homer, there is no building in front of it. But when the Simpson family, Ned and Dr. Hibbert visit Homer in his patient room, the Flanders house is in front of it with Ray on the roof, as seen in the patient room window. The Flanders house might've been so far away from the mental hospital that the house can be seen from the hospital.
The Knockers bartender should have seen (or at least heard) Ray, as he ordered the giant cup of beer and the nachos before Homer sat with him. But, the bartender had an eyepatch covering his left eye, so he only saw Homer and not Homer with Ray in the first place.
The Knockers bartender was at the mental hospital along with the rest of the Simpsons, Dr. Hibbert, Ned and Ray when they came to see Homer after the six-week electric shock treatment. However, he disappears when Stephen Hawking appears.
When Stephen Hawking explains how Bart couldn't see Ray at Builders' Barn, the flashback does not show a ladder behind Ray. In the original scene, there was a ladder behind him.
The gravitational lens created by the black hole should have absorbed the light of other stuff that was near Ray and Homer.
Moe's without its sign
During the opening sequence, the subtitles underneath the title card has the words, "350th EPISODE, MAN!", even though Don't Fear the Roofer is actually the 351st episode in both production and broadcast order. Future-Drama, which is the 350th episode to air in broadcast order (The Father, the Son and the Holy Guest Star is the 350th episode in production order), could've used those subtitles in the title card.
When Homer walks by Moe's Tavern in the rain while talking to himself, in an overhead view, the "Moe's" sign is gone. But, when just before Homer enters the bar, the "Moe's" sign is there.
