The Simpsons Season 38 Episode 2 Recap: Why Bart and Lisa Fight Over an Abandoned Baby Chimp

Bart and Lisa smile as Lisa holds the baby chimp in The Simpsons Season 38 Episode 2
Image courtesy of Fox and 20th Television Animation

The episode makes an animal rescue into a compact argument about care, fear and letting go. Spoilers for The Simpsons Season 38 Episode 2 follow. Bart and Lisa fight because finding an abandoned baby chimp turns them into opposite kinds of parents. Lisa believes Mr. Goodboy needs freedom to learn, while Bart becomes intensely protective after an early prank puts the animal in danger. Their shared rescue project quickly becomes a contest over who understands responsibility.

“Diary of a Chimpy Kid” uses the disagreement to reverse the siblings’ familiar roles. Bart starts by treating the chimp as a prank prop, but guilt makes him cautious. Lisa reaches for parenting books and embraces a freer approach, only to discover that theory does not settle every decision.

  • Release date: October 4, 2026
  • Episode: Season 38, Episode 2
  • Title: “Diary of a Chimpy Kid”
  • Genre: Animated comedy
  • Streaming on: Hulu

Mr. Goodboy exposes Bart and Lisa’s opposite instincts

The children find the chimp inside a little library box and decide that being abandoned makes him theirs. Bart immediately sees comic possibilities. When one of those ideas backfires, he promises to keep Mr. Goodboy out of danger and begins hovering over everything the chimp does.

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Lisa consults Marge’s parenting books and settles on giving the animal space. Bart reads that as neglect, while Lisa sees his caution as smothering. Their argument becomes recognizable because both positions grow from concern. Each sibling simply turns one useful instinct into an absolute rule.

Homer fears the chimp will attack him

Homer watches alarming videos about adult chimp strength and becomes convinced Mr. Goodboy will eventually attack his face or groin. The subplot exaggerates a genuine concern into one of Homer’s spirals, especially after Marge bonds with the animal and jokingly calls Homer the dominant male.

His panic still pushes the family toward recognizing that a chimp cannot remain an ordinary house pet. Bart and Lisa seek counseling, only to find Nelson filling in after the school therapist is defunded. Surprisingly, his advice helps them admit how their fighting is affecting the animal.

The rescue gives the siblings a shared goal again

Mr. Goodboy disappears and a tracker leads the family to an illegal private zoo. Bart and Lisa stop fighting long enough to rescue him, while Homer distracts the adult chimps. The animals are removed to a legitimate sanctuary, where Mr. Goodboy can receive appropriate care.

Sending him away is the episode’s real sign of growth. Bart and Lisa accept that loving an animal does not mean keeping it. Their conflict ends when they choose Mr. Goodboy’s needs over proving which sibling was right. Did Bart or Lisa have the better parenting instinct? Share your answer below.

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