The episode "Treehouse of Horror XXXV" from The Simpsons Season 36 consists of three distinct segments, each with its own storyline.

The first segment, titled "The Information Rage," opens with Springfield deeply divided politically, symbolized by two giant monsters--one red and one blue--emerging from the town. These monsters represent the extreme political rage and begin to wreak havoc, destroying parts of Springfield. The townspeople are caught in the chaos as the monsters clash, causing widespread destruction. The segment focuses on the escalating conflict between these two creatures, embodying the town's political polarization, and the resulting damage to the community.

The second segment, "The Fall of the House of Monty," is set in a Victorian-era version of Springfield. Mr. Burns is portrayed as a ruthless slavedriver who forces his employees to work long hours producing corn syrup by day and constructing his elaborate mansion by night. The workers, including Lenny's father and grandfather, suffer and die during the mansion's construction. On Thanksgiving night, Mr. Burns promises a dinner to the workers if they win a wishbone pull. Willie wins the pull, but Burns cruelly throws the promised dinner down a hole, breaking his promise. His ex-wife Agnes warns him that this act curses him to be tormented by the ghosts of everyone he has wronged until his death.

Later, an accident occurs when Homer, working at the corn syrup factory, tries to fill a cup but falls into a container of hot syrup. In his struggle, he pulls a chain that releases the stored syrup, washing away all the workers and killing them. After this, the ghosts of the deceased workers begin to haunt Mr. Burns at his mansion. They jump-scare him repeatedly, pushing him over a balcony toward Agnes's body, blocking all his exits, and surrounding him. Burns attempts to appease them by offering food, but the ghosts demand his soul. In desperation, Burns throws himself into a fire, burning both himself and the mansion. The segment ends with Smithers and Sideshow Mel visiting the ruins the next day, puzzled by Burns's actions. They decide to call the day "Black Friday," a reminder never to mistreat workers again.

The third segment, "Denim," features Homer bonding with a pair of extra-terrestrial jeans. The jeans are actually a symbiotic alien life form that convinces Homer to become its host. The alien explains that toxic rain on its home planet caused its inhabitants to age rapidly, and now it needs to survive in the human world by bonding with a host. Homer wears the jeans, which grant him unusual powers and abilities. The segment follows Homer's interactions with the alien jeans, showcasing their symbiotic relationship and the challenges they face together.

Each segment is distinct in tone and style, with the first focusing on political satire through monster battles, the second on gothic horror with ghostly revenge, and the third on a sci-fi symbiote adventure centered on Homer. The episode blends horror, humor, and social commentary across these three stories.

The ending of The Simpsons Season 36, Episode 5, "Treehouse of Horror XXXV," concludes with Homer bonding with an alien pair of jeans that take him as their host, leaving him permanently connected to the symbiotic pants. Meanwhile, the other segments end with Mr. Burns being pulled into Hell after being haunted by the ghosts of his factory workers, and the town of Springfield being devastated by giant political rage monsters.

Expanded narrative of the ending scene by scene:

The episode is divided into three distinct segments, each with its own story and conclusion.

1. The Information Rage (Kaiju segment):
   Springfield is under attack by giant monsters born from political outrage. These kaiju rampage through the town, causing widespread destruction. The townspeople struggle to defend themselves, but the monsters' fury is relentless. The segment ends with Springfield largely destroyed by these political rage monsters, symbolizing the destructive power of unchecked political anger. The fate of the main characters in this segment is implied to be grim as the town is devastated, but specific individual outcomes are not detailed.

2. The Fall of the House of Monty (Mr. Burns segment):
   Set in a Victorian era style, Mr. Burns is haunted on Thanksgiving by the ghosts of his factory workers whom he had abused. The ghosts repeatedly jump-scare him, tormenting him for his cruelty. In a final act, Mr. Burns kills himself to escape their hauntings, but this only results in him being dragged down into Hell by the vengeful spirits. This segment ends with Mr. Burns' eternal damnation, a direct consequence of his mistreatment of others. The ghosts remain as the agents of his punishment, and no other main characters are involved in this conclusion.

3. Denim (Homer and the alien jeans segment):
   Homer encounters a pair of extraterrestrial jeans that bond with him symbiotically. Over the course of the segment, Homer develops a connection with the jeans, which exhibit their own consciousness and powers. The story culminates with Homer choosing to remain bonded with the alien jeans rather than returning to his normal life or to Marge. This ending leaves Homer permanently linked to the alien symbiote, suggesting a transformation or loss of his previous identity. Marge and other family members are left behind, highlighting a shift in Homer's character arc for this segment.

Each segment ends independently, with no crossover between the stories. The episode closes after the third segment, with Homer's fate sealed as the host of the alien jeans, Mr. Burns condemned to Hell, and Springfield devastated by monstrous political rage. The episode does not feature Maggie Simpson except in the special title sequence.

This structure maintains the traditional Treehouse of Horror format of three separate, self-contained stories with dark or supernatural themes, each concluding with a definitive fate for the characters involved.

The episode "Treehouse of Horror XXXV" from The Simpsons season 36 does not have a post-credit scene. Available detailed sources, including the episode synopsis, reviews, and end credits videos, do not mention or show any post-credit scene following the episode's conclusion. The episode ends after the three self-contained segments without additional scenes after the credits.

The giant monsters in 'The Information Rage' segment are manifestations of Springfield's rampant political divide, with two giant red and blue monsters representing opposing political outrage that begin to destroy the town.

Mr. Burns becomes haunted after he breaks a Thanksgiving promise to feed his workers, who have been overworked building his mansion and making corn syrup. An accident caused by Homer releases the stored corn syrup, washing away the workers who then appear as ghosts to torment Burns.

The Thanksgiving wishbone pull is a contest that Mr. Burns promises will win the workers a dinner. Although Willie wins the wishbone pull, Burns spitefully throws the dinner down a hole, which triggers the curse and the haunting by the workers' ghosts.

Desperate to escape the ghosts, Mr. Burns throws himself into a fire, burning both himself and his mansion. However, he ends up going straight to hell, and the segment ends with a joke about Black Friday.

In the 'Denim' segment, which parodies 'Venom,' Homer bonds with an alien pair of jeans that takes him as its host, leading to a stop-motion adventure where the jeans have extraterrestrial origins.

"Treehouse of Horror XXXV" from Season 36 of "The Simpsons" may not be entirely family-friendly due to several potentially objectionable or upsetting scenes. Here are some aspects that might concern parents or sensitive viewers:

1. Violence and Gore: The episode contains moderate levels of violence and gore, typical of the "Treehouse of Horror" series. This includes scenes with monsters and supernatural elements that might be disturbing for younger viewers.

2. Frightening Scenes: There are moderate frightening and intense scenes, which are common in horror-themed episodes. These can include jump scares and eerie settings.

3. Mature Themes: The episode touches on mature themes such as political outrage and workplace abuse, which might not be suitable for all ages.

4. Mild Profanity and Nudity: While mild, there is some profanity and nudity, which parents might want to consider when deciding if the episode is appropriate for their children.

Overall, while not excessively graphic, the episode's content is geared more towards older children and adults due to its horror elements and mature themes.