S6·E13 Unforgiven

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S6E13 (Unforgiven).
Constraint 1: Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
Constraint 2: No invented/guessed titles, names, dates, counts, awards, ratings, numbers, or plot points.
Constraint 3: Original, neutral, encyclopedic prose.
Constraint 4: Plain text only (no markdown, no asterisks, no headings, no bullet points).
Constraint 5: Word count target: 280-380 words.
Synopsis: Sam has flashbacks to a case he worked on with Samuel before reconnecting with Dean. Sam receives a mysterious text with coordinates to a small town. The brothers decide to investigate. Dean is surprised when townspeople tell him about things Sam did while living there.
Sources:
[1] TMDB: Series overview (saving people, hunting things).
[2] Wikipedia: Created by Eric Kripke. Aired on The WB and The CW for 15 seasons (Sept 13, 2005 - Nov 19, 2020). Stars Jared Padalecki as Sam and Jensen Ackles as Dean Winchester.
[3] TMDB Cast & Crew: Sam and Dean lost their mother to a demonic force. Father raised them as soldiers to kill paranormal evil.
[4] Simple English Wikipedia: Horror, drama, fantasy, fiction series. Created by Eric Kripke.
[5] Moviefone: Similar to [3].
Episode Specifics:
Sam experiences flashbacks regarding a case involving Samuel that occurred prior to his reconnection with Dean.
Sam receives a mysterious text message containing coordinates for a small town.
Sam and Dean Winchester investigate this location.
During the investigation, Dean hears accounts from townspeople regarding Sam's past actions while he resided in that town.
Series Context (to fill word count if needed, but must be careful not to drift from the episode):
The series Supernatural was created by Eric Kripke.
It stars Jared Padalecki as Sam Winchester and Jensen Ackles as Dean Winchester.
The show follows the brothers as they hunt paranormal evil.
Drafting (Mental):
In the episode Unforgiven, Sam Winchester experiences flashbacks to a specific case he worked on with an individual named Samuel. This case took place before Sam reconnected with his brother, Dean Winchester. The narrative progresses when Sam receives a mysterious text message that includes coordinates to a small town. Following the receipt of these coordinates, the Winchester brothers decide to investigate the area. Upon their arrival, Dean is surprised by the information provided by the local townspeople. These