Supernatural - Season 12 - Eps 21: There's Something About Mary
Sam and Dean are alarmed when they learn hunters are being killed by suspicious “accidents” all over the country. They decide it is best to find Mary and make sure she’s safe. Meanwhile, Toni is back in the states and she and Mary face off.
About Supernatural

Title: Supernatural
First Air Date: 2005-09-13
Last Air Date: 2020-11-19
Status: Ended
Rating: 8.297/10 (from 7784 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