There were two scenes from this episode that aired in promos, but not in the actual episode. The first scene involved Homer assuring Lisa that he's "Not going anywhere for at least 10 years." Dr. Hibbert appears and clears his throat in a motion to infer that Homer might have less time to live, but Homer dismisses it as Dr. Hibbert having a severe cold. The second scene was at the funeral, where Jeffery Albertson is on his smartphone, saying that the funeral was the worst one he ever "Live-Tweeted."
The chalkboard gag stating "Spoiler alert: Unfortunately, my dad doesn't die" is a reference to Homer not being the character killed off in this episode.
Several of the things Krusty mentions in his sketches during the binge watch are: Deuteronomy, Hippocampus (Asking if it's another name for the University of Mississippi), Dom DeLuise, Mama Cass, The cast of What's Happening!!, William "The Refrigerator" Perry, Newman from Seinfield, the Whale from Whale Rider, and Adele.
When mentioning William "The Refrigerator" Perry, Krusty is dressed up as and mimics the act of Gallagher. When mentioning The whale from whale rider, he's dressed up as Captain Jack Sparrow from Pirates of the Caribbean. When mentioning Adele, Krusty is dressed up as Wolverine from Marvel (With candles substituting the Adamantium claws).
The ringtone that opens several scenes is the one that opens the Treehouse of Horror XVII segment "You Gotta Know When to Golem."
If The Simpsons actually make it to the year 10.535 (as the couch gag suggests) without skipping any season, It would be on it's 8.545th season. As in the couch gag, it was on the 164.775.7th episode, the show would have around 19 episodes per season since 1990.