S10·E19 The Werther Project

Episode recap

Topic: Supernatural S10E19 (The Werther Project) episode recap.
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
No invented titles, names, dates, counts, awards, ratings, etc.
No guessing or inventing plot points.
Original, neutral, encyclopedic prose.
Plain text only (no markdown, no asterisks, no headings, no bullet points).
Word count: 280-380 words.
Provided Material:
Synopsis: Sam learns former Men of Letters, Magnus, built a magical box. Sam seeks it to cure Dean of the Mark of Cain. Magnus set a deadly alarm system on the box. Opening the box puts Sam and Dean's lives in danger.
Sources: General series info (created by Eric Kripke, stars Jared Padalecki and Jensen Ackles, aired on WB/CW, etc.).
Sam Winchester (played by Jared Padalecki) learns about a magical box built by a former Man of Letters named Magnus.
Sam's goal: Find the box to cure Dean Winchester (played by Jensen Ackles) of the Mark of Cain.
Conflict: Magnus installed a deadly alarm system on the box.
Outcome/Risk: Opening the box puts the lives of both Sam and Dean in danger.
The synopsis is very short. The prompt asks for 280-380 words.
Problem: If I only use the provided synopsis, I cannot reach 280 words without repeating myself or adding "fluff" which violates the "neutral, encyclopedic prose" and "never invent" rules.
Constraint Check: "If the synopsis is sparse, stay concise rather than guessing."
Conflict: The user asks for 280-380 words but also says "If the synopsis is sparse, stay concise rather than guessing."
Decision: I must prioritize the "verifiable facts" and "never invent" rules. If I cannot reach 280 words using only the provided facts without being repetitive or making things up, I must follow the instruction to stay concise and avoid guessing. However, I will try to expand on the context provided by the sources (series info) to see if I can reach a reasonable length, but the core of the recap must come from the synopsis.

Wait, looking at the sources:
Source [3] says the series follows brothers Sam (Jared Padalecki) and Dean (Jensen Ackles).
Source [1, 4] mentions they lost their mother to a demonic force and were raised by their father to hunt paranormal evil.

Drafting Content:
In the episode titled The Werther Project, Sam Winchester, played by Jared Padalecki, discovers information regarding