S9·E9 Holy Terror

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S9E9 (Holy Terror).
Constraint 1: Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
Constraint 2: No invented titles, names, dates, counts, awards, ratings, numbers, or plot points.
Constraint 3: If a detail is not in the material, omit it.
Constraint 4: 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: "The angels are embroiled in a bloody civil war, and Castiel is swept up in the conflict. Meanwhile, Dean realizes that Ezekiel is not who he claims to be and tries to warn Sam with dire results."
Series Sources:
Series title: Supernatural.
Created by: Eric Kripke.
Main characters: Sam Winchester (Jared Padalecki) and Dean Winchester (Jensen Ackles).
Premise: Brothers follow their father's footsteps as hunters, fighting evil supernatural beings like monsters, demons, and gods.
Cast: Jared Padalecki, Jensen Ackles, Jim Beaver, Misha Collins.
Broadcast history: The WB and The CW, 15 seasons, 2005-2020.
Episode: S9E9 (Holy Terror).
Plot point 1: Angels are in a bloody civil war.
Plot point 2: Castiel is involved in this conflict.
Plot point 3: Dean realizes Ezekiel is not who he claims to be.
Plot point 4: Dean tries to warn Sam.
Plot point 5: Dean's warning has dire results.
The provided synopsis is extremely short (only about 40 words).
The sources provide general series information but no additional plot details for this specific episode.
The prompt requires a 280-380 word recap.
Conflict: I cannot invent details to reach the word count. I must only use provided facts. If the provided facts are insufficient to reach 280 words without violating the "never invent or guess" rule, I must prioritize the "only verifiable facts" rule. However, the prompt asks for a 280-380 word recap.
Strategy: I will expand on the context provided by the series sources (the nature of the show, the characters, the premise) to frame the episode's specific synopsis, while strictly adhering to the facts. I will describe the characters and the series setting as provided in the sources to