S7·E10 Death's Door

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S7E10 (Death's Door).
Constraint 1: Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
Constraint 2: Do not invent/guess titles, names, dates, counts, awards, ratings, etc.
Constraint 3: If a detail is not in the material, omit it.
Constraint 4: Write original, neutral, encyclopedic prose in plain text.
Constraint 5: No markdown, no asterisks, no headings, no bullet points.
Constraint 6: Word count target: 280-380 words.
TMDB Episode Synopsis: "As Sam and Dean race the clock on a high-stakes mission, Bobby seeks the help of an unlikely old friend to solve one of the most personal cases of his life."
Series Sources:
Series name: Supernatural.
Created by: Eric Kripke.
Main characters: Sam Winchester (Jared Padalecki) and Dean Winchester (Jensen Ackles).
Other cast: Jim Beaver, Misha Collins.
Premise: Brothers follow father's footsteps as hunters, fighting evil supernatural beings (monsters, demons, gods).
Airing info: First broadcast on The WB, later The CW. 15 seasons. Started Sept 13, 2005.
Episode Title: Death's Door (S7E10).
Characters involved in the episode: Sam, Dean, Bobby.
Plot point 1: Sam and Dean are on a high-stakes mission where they are racing against the clock.
Plot point 2: Bobby seeks help from an unlikely old friend.
Plot point 3: Bobby's goal is to solve one of the most personal cases of his life.
The synopsis is extremely brief.
The sources provide general series info but nothing about the specific plot of S7E10 other than the synopsis.
Problem: The user wants a 280-380 word recap. The provided synopsis is only about 35 words.
Constraint Check: "If the synopsis is sparse, stay concise rather than guessing." and "Never invent or guess... plot points."
Conflict: I cannot reach 280 words without inventing details or repeating the series overview excessively. However, the instructions say "Write a grounded 280-380 word episode recap".
Strategy: I must include the series context (who Sam, Dean, and Bobby are based on the sources) to build the word count, but I cannot invent plot details for the episode itself. I will describe the characters and the