S8·E14 Trial and Error

Episode recap

Topic: Supernatural S8E14 (Trial and Error) episode recap.
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
Do not invent/guess titles, names, dates, counts, awards, ratings, etc.
If a detail is not in the material, omit it.
Write original, neutral, encyclopedic prose in plain text.
No markdown, no asterisks, no headings, no bullet points.
Word count: 280-380 words.
TMDB Episode Synopsis: Kevin deciphers the demon tablet and figures out how to close the gates of Hell. He tells Sam and Dean that according to the tablet one person must face a series of three trials, and the first one is to kill a hellhound.
Sources [1-5]:
Series Title: Supernatural.
Created by: Eric Kripke.
Cast: Jared Padalecki (Sam Winchester), Jensen Ackles (Dean Winchester), Jim Beaver, Misha Collins.
Premise: Sam and Dean Winchester hunt demons and other supernatural beings.
Broadcast history: Started Sept 13, 2005, on The WB, later The CW, ran for 15 seasons until Nov 19, 2020.
The synopsis is extremely sparse. It only covers the core plot of the episode: Kevin deciphers the tablet, explains how to close Hell, mentions the three trials, and identifies the first trial (killing a hellhound).
The sources provide context about the show (creators, actors, general premise).
Problem: The user wants a 280-380 word recap. The provided synopsis is only about 45 words.
Constraint Check: "If the synopsis is sparse, stay concise rather than guessing." and "Use only supplied facts."
Conflict: I cannot reach 280 words without inventing details or repeating the same facts endlessly, which violates the "original, neutral, encyclopedic prose" and "do not invent" rules.
Strategy: I must expand on the context provided by the sources (the series background) to reach the word count, while strictly adhering to the episode synopsis for the episode-specific content. However, the prompt asks for an episode recap. An episode recap that is mostly series history is technically a recap of the context, but I must be careful.
Drafting Content:
Introduce the series: Supernatural is an American television series created by Eric Kripke. It aired for 15 seasons from September 13, 2005, to November 19, 2020, on The WB and The CW.
Introduce characters