Supernatural - Season 9 - Eps 20: Bloodlines
Sam and Dean learn about a monster killing in Chicago and head there to investigate. What they find is a young cop whose girlfriend was killed by the same creature, and who is caught between five powerful clans of monsters who jointly control the city.
About Supernatural

Title: Supernatural
First Air Date: 2005-09-13
Last Air Date: 2020-11-19
Status: Ended
Rating: 8.297/10 (from 7783 votes)
Language: EN
Seasons: 16
Total Episodes: 327
Network: The WB The CW
Genres: Drama, Mystery, Sci-Fi & Fantasy
Production Companies: Kripke Enterprises, Supernatural Pictures, Wonderland Sound and Vision, Warner Bros. Television
Synopsis
When they were boys, Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Subsequently, their father raised them to be soldiers. He taught them about the paranormal evil that lives in the dark corners and on the back roads of America ... and he taught them how to kill it. Now, the Winchester brothers crisscross the country in their '67 Chevy Impala, battling every kind of supernatural threat they encounter along the way.
Cast

Jared Padalecki
Sam Winchester

Jensen Ackles
Dean Winchester

Misha Collins
Castiel