S8·E3 Heartache

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S8E3 (Heartache).
Constraint 1: Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
Constraint 2: No inventing/guessing titles, names, dates, counts, awards, ratings, etc.
Constraint 3: Original, neutral, encyclopedic prose in plain text.
Constraint 4: No markdown, no asterisks, no headings, no bullet points.
Constraint 5: Word count target: 280-380 words.
Constraint 6: If the synopsis is sparse, stay concise rather than guessing.
TMDB Episode Synopsis: Sam and Dean investigate a string of unusual murders where the victims were all recipients of organs from the same donor. The killer is captured, but things become even more complicated when the brothers find their killer in a trance mumbling an ancient prayer.
Source [1]: Series overview (Saving people, hunting things, the family business).
Source [2]: Cast and crew credits (no specific plot info).
Source [3]: Series info (15 seasons, Sept 13, 2005 - Nov 19, 2020, Sam played by Jared Padalecki, Dean played by Jensen Ackles, hunt demons, monsters, and other supernatural beings).
Source [4]: Backstory (Sam and Dean lost mother to demonic force, father raised them as soldiers).
Source [5]: Creator (Eric Kripke), Network (The WB/The CW), Stars (Jared Padalecki as Sam, Jensen Ackles as Dean).
Episode: S8E3 (Heartache).
Characters: Sam Winchester (Jared Padalecki) and Dean Winchester (Jensen Ackles).
Plot: Investigating unusual murders. Victims were recipients of organs from the same donor.
Outcome: Killer is captured.
Twist: Killer is in a trance mumbling an ancient prayer.
The provided synopsis is extremely short (only about 45 words).
The instructions say: "If the synopsis is sparse, stay concise rather than guessing."
The instructions also say: "Write a grounded 280-380 word episode recap."
Conflict Check: If I only use the provided facts, I cannot reach 280 words without repeating myself or inventing details. However, the prompt explicitly forbids inventing details.
Strategy: I must expand on the context provided by the sources (the series background, the actors, the nature of the show) to reach the word count, while strictly adhering to the "no inventing" rule. I will describe the series context and then the specific episode plot.