Someone's out to kill Homer, after Homer gets locked into a sauna by a hooded man and only Sideshow Bob can figure out who that is.

!! Tropes:
* CallBack: Most of Homer's past enemies were from previous episodes, including [[spoiler:the son of deceased nuclear plant worker, Frank Grimes]].
* [[spoiler:DeadGuyJunior: Frank Grimes, Jr. is the person trying to kill Homer.]]
* HumanCannonball: Bob gets into the cannon on one of the Mardi Gras floats and lights the fuse in order to launch himself into the air and save Homer from getting ImpaledWithExtremePrejudice on one of the swordfish in the swordfish museum.
* {{Jerkass}}: Homer's friends at the bar actually give Sideshow Bob advice and encouragement to kill Bart.
* RecruitingTheCriminal
* SaunaOfDeath: First attempt on Homer's life. He was actually already in danger by being in the sauna at all because of his obesity and heart problems. The sauna controls helpfully included the setting [[InventionalWisdom "murder"]].
* WhyDontYouJustShootHim: Sideshow Bob was asked why he doesn't just shoot Bart. [[spoiler:He tried it at the end of the episode and it turns out he grew accustomed to Bart's face.]]
* [[spoiler:YouKilledMyFather: The reason Frank Grimes, Jr. tries to kill Homer.]]