S6·E11 Appointment in Samarra

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S6E11 (Appointment in Samarra).
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
No invented titles, names, dates, counts, awards, ratings, box-office, or plot points.
Omit details not in the material.
Original, neutral, encyclopedic prose.
Plain text only (no markdown, no asterisks, no headings, no bullet points).
Word count: 280-380 words.
Synopsis:
Dean seeks out Death to help get Sam's soul back.
Death tells Dean he will help Sam if Dean agrees to act as Death for 24 hours.
Sam decides he doesn't want his soul back.
Sam asks Balthazar for a protective spell to keep his soul out of his body.
Balthazar says the spell needs the blood of Sam's father.
Since John Winchester is dead, Sam decides Bobby is the next best thing.
Sources:
Series title: Supernatural.
Created by: Eric Kripke.
Cast: Jared Padalecki (Sam Winchester), Jensen Ackles (Dean Winchester), Jim Beaver, Misha Collins.
Genre: Drama, Mystery, Sci-Fi & Fantasy, Dark Fantasy.
Network: The WB and later The CW.
Run: 15 seasons (2005-2020).
Drafting Content:
In the episode Appointment in Samarra, Dean Winchester, played by Jensen Ackles, seeks out Death in an attempt to retrieve Sam Winchester's soul. Death agrees to assist Dean in getting Sam's soul back, but only on the condition that Dean agrees to act as Death for a period of 24 hours.

While Dean pursues this deal, Sam Winchester, played by Jared Padalecki, makes a different decision regarding his own soul. Sam decides that he does not want his soul returned to him. To ensure this, Sam approaches Balthazar to request a protective spell that will keep his soul out of his body. Balthazar informs Sam that for the spell to be successful, it requires the blood of Sam's father. Because John Winchester is deceased, Sam determines that Bobby is the next best option to provide the necessary blood for the spell.
Word Count Check:
The draft above is very short (approx 150 words). The prompt requires 280-380 words.
Problem: The provided synopsis is extremely sparse. If I strictly follow "Write ONLY verifiable facts that are explicitly supported by the provided SYNOPSIS and SOURCES" and "If a detail is not