S8·E6 The CuRicksous Case of Bethjamin Button

Episode recap

Task: Write a grounded 280-380 word episode recap for Rick and Morty S8E6 ("The CuRicksous Case of Bethjamin Button").
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
No invented titles, names, dates, counts, awards, ratings, etc.
If a detail is missing, omit it.
Style: Original, neutral, encyclopedic prose, plain text.
No markdown, no asterisks, no headings, no bullet points.
Word count target: 280-380 words.
Synopsis: "The brohs goes to a theme park Rick loves. Beth and Space Beth stay behind and regress or something."
Sources:
[1] Series overview: Science makes sense, family doesn't. Follows a sociopathic genius scientist.
[2] Creators: Dan Harmon, Justin Roiland. Cast: Chris Parnell, Spencer Grammer, Sarah Chalke, Justin Roiland. Premise: Fractured domestic lives of a nihilistic mad scientist and his anxious grandson.
[3] Premise: Sociopathic genius scientist drags his inherently timid grandson on adventures.
[4] Metascore: 84. Years: 2013-2026. Seasons: 12. Network: Adult Swim. Genres: Animation, Action & Adventure, Comedy. Awards: 2015 Annie nomination.
[5] Characters: Rick Sanchez (cynical mad scientist), Morty Smith (good-hearted but fretful grandson). Premise: Interdimensional adventures across infinite realities.
Episode Title: "The CuRicksous Case of Bethjamin Button" (from prompt).
Episode Number: S8E6 (from prompt).
Plot: The brohs go to a theme park Rick loves. Beth and Space Beth stay behind and regress.
Context: Rick Sanchez is a cynical, sociopathic, nihilistic mad scientist. Morty Smith is his good-hearted, fretful, anxious, and timid grandson. The series involves interdimensional adventures across infinite realities.
The provided synopsis is extremely sparse: "The brohs goes to a theme park Rick loves. Beth and Space Beth stay behind and regress or something."
The word count requirement is 280-380 words.
Problem: I cannot invent details to reach the word count. If I only use the provided facts, the text will be very short.
Constraint Check: "If the synopsis is sparse, stay concise rather than guessing."
Conflict: The user asks for 280-380 words, but the source material only provides about 20 words of plot.
Strategy: I must include