The string is a specific release filename for the 18th episode of Supernatural's 13th season, titled "Bring 'em Back Alive." Episode Summary
If you are looking to watch this episode, it is available through several official platforms:
: Back in the main universe, Lucifer occupies the throne of Heaven. However, his attempt to rule the angels proves difficult as he struggles with his own insecurities and the lack of respect from the heavenly host.
: Sam Winchester and Castiel work together to find a way to open a more stable rift to the Apocalypse World, dealing with a weakened Gabriel who is suffering from severe trauma after years of torture by Asmodeus. File Metadata Breakdown
If you are looking at this specific filename, here is what the technical tags mean: : Season 13, Episode 18.
: The distribution tag for EZTV, a well-known TV torrent distribution site. Where to Watch Legally
: Dean Winchester travels into the "Apocalypse World" to rescue Mary and Jack. During his search, he encounters a familiar but alternate version of Charlie Bradbury, who is a resistance fighter in this reality.