VIDEO: Watch Mid-Season Promo for SUPERNATURAL, Returning to The CW 3/18

SUPERNATURAL returns to The CW with all-new episodes on Wednesday, March 18th. Get a sneak peek below!

The thrilling and terrifying journey of the Winchester Brothers continues with the ninth season of "Supernatural" on The CW.

Sam (Jared Padalecki) and Dean (Jensen Ackles) have spent the last eight years battling the things that go bump in the night. Over the years, with the help of the fallen angel Castiel (Misha Collins), and the King of Hell, Crowley (Mark A. Sheppard), the Winchesters have straddled the line between good and evil.

Last season, the boys faced their most important mission yet: close the gates of Hell once and for all. With the help of the prophet Kevin Tran (Osric Chau), Sam and Dean set forth to perform the Trials required to close the gates. While the boys worked to shut Crowley and his minions down for good, a new threat to his reign emerged: the Knight of Hell, Abaddon (Alaina Huffman). As the struggle for Hell's command began, Castiel set about his own set of Trials. With the aid of God's scribe Metatron (Curtis Armstrong), Cass went on a mission to close the Gates of Heaven. However, he found out too late that the Scribe had nefarious intentions, and Cass paid the price. His Grace forcibly removed, Castiel watched as Metatron's machinations came to fruition - and the angels of Heaven fell.

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