The episode "Desperately Seeking Lisa" begins with the Simpson family at the train station, where Lisa and Marge are engaged in a tense argument. Lisa expresses her frustration with how "lame" Springfield is, which upsets Marge. Despite this, Lisa is sent off to spend the weekend in Capitol City with her aunts Patty and Selma. The family departs, and after this initial scene, the rest of the episode focuses almost entirely on Lisa, with the other Simpsons barely appearing again until late in the episode.

Once in Capitol City, Patty and Selma prioritize their own interests, specifically spending time at a Laramie Cigarettes-themed restaurant. However, they are ironically kicked out for smoking inside. While there, they run into some artist friends they had met previously at a Pride parade. Lisa, meanwhile, is drawn to the city's vibrant art scene and sneaks away from her aunts to explore and engage with these artists.

Lisa encounters Superintendent Chalmers, who is spending the evening with Lunchlady Dora at a nearby hotel. They attend a theater performance of "The Roach," a play about a father throwing apples at his son who has transformed into a cockroach. Lisa interrupts the performance to stop the father's abusive behavior. The playwright, Tracy Letts, appears and congratulates Lisa for changing the story's outcome. Impressed, the artists propose that Lisa enter the Horace Frick Academy, a prestigious art school. However, Lisa reveals she cannot afford the tuition.

Julian, one of the artists, suggests Lisa ask Lacey Van Aster, a wealthy benefactor, for financial help. Lisa visits Lacey's home, where Lacey agrees to assist her. Just as Lisa is about to go to bed, she notices a picture of the artists with Martin Prince. Suddenly, the artists enter her room and reveal that their offer was a scam designed to extract money from Lacey, just as they had done with Martin. To coerce Lisa into compliance, they show her a video they fabricated, making it appear as if Lisa stole a piece of art when she had only moved it.

Lisa manages to escape from the artists with the check from Lacey. However, a crowd of artists follows her to a museum, where they create various paintings and artworks depicting Lisa as a thief. Lisa finds refuge in an alley and attempts to call her family at home, but they do not answer because they are distracted watching a documentary on ringtones.

Lisa then encounters Superintendent Chalmers again, this time with Ms. Hoover. They help her hide in their hotel room. Lisa begins to explain what happened, but Lunchlady Dora storms in after discovering Chalmers' other date. Chalmers escapes through the window, steals a rented bike, and rides it into a lake, leaving Lisa alone and in trouble once more.

Near the end of the episode, there is a brief callback to the opening argument between Lisa and Marge. Lisa pulls out a juice box her mother gave her, but the family remains largely absent from the episode's main events, emphasizing Lisa's independence and misadventure in the big city.

At the end of "Desperately Seeking Lisa," Lisa escapes from a group of artists who had used her to steal money by tearing up a check they gave her. She hides under a large uninflated balloon during an artist parade, accidentally inflates it, and floats back home to Springfield. Exhausted and sleep-deprived, she hallucinates the balloon talking to her. Upon returning to Springfield Elementary, she confronts Superintendent Chalmers and then joins her classmates in reading a story about a firecracker afraid of noise.

Expanded narrative of the ending scene by scene:

After a tense chase through Capitol City, Lisa throws down the bag containing stolen money, drinks a juice box to refresh herself, and insults her pursuers before running away. The morning arrives, and the artists catch up to her at the park where an artist parade is about to begin. To evade them, Lisa hides beneath a large uninflated balloon. However, she accidentally hits the inflation machine, causing the balloon to inflate and trap her inside.

As Lisa struggles inside the balloon, she tears up the check the artists had given her, which was part of their scam. Julian, one of the artists, instructs Katya to deflate the balloon with a knife to free Lisa. Instead, Katya cuts the balloon loose, allowing Lisa to float away from the city.

Lisa rides the balloon back to Springfield, talking to it as a hallucination brought on by her lack of sleep. Upon landing, she enters Springfield Elementary School, where she salutes Martin Prince with a hat they had given her earlier. She encounters Superintendent Chalmers, who is still dealing with the aftermath of his own night in the city. Elizabeth Hoover and Dora, two other characters involved in the story, walk by Chalmers looking angry.

The episode closes with Lisa and her classmates reading a story titled "The Firecracker Who Didn't Want to Go Boom," symbolizing themes of fear and courage.

In terms of character fates at the end:

• Lisa returns safely to Springfield, having learned about the deceptive nature of the artists and asserting her independence.
• Superintendent Chalmers remains at the school, dealing with his own complicated experiences from the city.
• The artists remain in Capitol City, their scam exposed but not fully resolved within the episode.
• Other family members like Marge, Homer, Bart, and Maggie have minimal presence and are mostly absent from the episode's conclusion.

This ending highlights Lisa's resilience and independence as she navigates a confusing and risky urban adventure largely on her own.

The Simpsons Season 36, Episode 3, "Desperately Seeking Lisa," does not have any documented post-credit scene. Available detailed episode summaries and reviews do not mention or describe any post-credit or after-credits scene following the episode's conclusion.

The episode focuses almost entirely on Lisa's solo adventure in Capital City, with minimal appearances from the rest of the Simpson family. The story ends with Lisa escaping a tricky situation involving artists who used her to steal money, and a chase involving Principal Skinner, but no additional scenes after the credits are noted in sources.

Therefore, based on current information, there is no post-credit scene in "Desperately Seeking Lisa."

Lisa is sent to Capital City for the weekend with Patty and Selma after a fight with Marge, and during her visit, she encounters a group of artists and becomes involved in their world after interrupting a theater performance, which leads to her being invited to enter the Horace Frick Academy but then caught in a scam by some artists.

Patty and Selma prioritize spending time at a Laramie Cigarettes theme restaurant and get kicked out for smoking, after which they run into artist friends from a previous Pride parade, indirectly connecting Lisa to the art scene and its chaotic environment.

Superintendent Chalmers appears twice in the episode, first with Lunchlady Dora at a hotel and later with Ms. Hoover, helping Lisa hide from the artists who are after her, though he ultimately escapes in a dramatic fashion, leaving Lisa to face trouble alone.

Lisa is tricked by artists who use her as bait for a scholarship scam, showing her a staged video of her 'stealing' art to blackmail her, and then they create artworks depicting her as a thief to discredit her, forcing her to escape with a check to avoid police involvement.

The episode focuses almost entirely on Lisa, with Marge, Bart, Homer, and Maggie barely appearing; the family is only briefly seen at the start when dropping Lisa off at the train station and briefly when Lisa tries to call home, but they do not significantly influence the main plot.

The Simpsons Season 36, Episode 3, "Desperately Seeking Lisa," is generally family-friendly but contains some mild content that might be potentially objectionable or upsetting for very young children or sensitive viewers. The episode includes:

• Mild sexual references and nudity.
• Mild violence and intense scenes, mostly related to Lisa being chased or in stressful situations.
• Moderate profanity.
• Moderate depiction of alcohol, drugs, and smoking.

These elements are typical of The Simpsons' usual style and are presented in a comedic, satirical context rather than graphic or disturbing ways. There are no extreme or graphic scenes, but the episode's themes of Lisa navigating a challenging urban adventure and being misunderstood might be a bit intense for very young or sensitive children.

Overall, it is suitable for older children and general family viewing with parental discretion advised for younger or sensitive viewers.