S15·E12 Galaxy Brain

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S15E12 (Galaxy Brain).
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
No invented titles, names, dates, counts, awards, ratings, box-office, viewership, or plot points.
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: 280-380 words.
Synopsis: Sam and Dean respond to a frantic call and together along with Castiel, Jack and Jody, assist in an extraordinary and heartbreaking rescue. Billie surprises everyone with a visit to the bunker.
Sources:
[1] TMDB: Series overview (Saving people, hunting things, the family business).
[2] Wikipedia: Broadcast dates (Sept 13, 2005, to Nov 19, 2020), 15 seasons, Sam (Jared Padalecki) and Dean (Jensen Ackles) hunt demons, monsters, and other supernatural beings.
[3] IMDb: Cast/crew info (no specific episode details).
[4] TMDB Cast: Sam and Dean lost mother to demonic force, father raised them as soldiers.
[5] Simple English Wikipedia: Created by Eric Kripke.
Episode Title: Galaxy Brain (S15E12).
Characters involved in the episode: Sam, Dean, Castiel, Jack, Jody, Billie.
Plot points:
Sam and Dean respond to a frantic call.
Sam, Dean, Castiel, Jack, and Jody assist in an extraordinary and heartbreaking rescue.
Billie visits the bunker, which surprises everyone.
The synopsis is extremely short (only two sentences).
The sources provide general series information but nothing about the specific plot of S15E12 other than what is in the synopsis.
Problem: The user wants a 280-380 word recap. The provided synopsis is roughly 35 words.
Constraint Check: "If the synopsis is sparse, stay concise rather than guessing." and "Use only supplied facts. Never add dialogue, scene order, character names or plot events not explicitly present."
Conflict: I cannot meet the 280-380 word count requirement without violating the "only verifiable facts" and "never invent" rules. If I write 280 words based on a 35-word synopsis, I will be inventing details, which is strictly forbidden.
I must prioritize the "ONLY verifiable facts