"Welcome to the end," Dean says in the first teaser for Supernatural's final season. In this case, truer words have never been spoken. The sneak peek, which dropped Friday, alludes to one hell of a journey ahead for the Winchesters, who must face their past in ways they could never have anticipated.

In the preview, Sam (Jared Padalecki) and Dean (Jensen Ackles,) discover an abandoned red car with blood smeared all over its window. It's a brutal but familiar scene that confirms what we already knew--the Woman in White (Sarah Shahi), who the Winchesters banished to hell in the pilot episode, is back. Oh, and it looks like everybody's favorite psychotic serial killer clown John Wayne Gacy will also return for the final season.

Season 15 finds Sam, Dean and Cas chasing down a bevy of familiar foes like Gacy and the Woman in White, who returned following Chuck's (Rob Benedict) aggressive finger-snap which opened up the gates of hell in the mindblowing Season 14 finale. With God no longer on their side, the boys will go through a crisis of faith as they face their biggest battle yet.

Supernatural returns for its 15th and final season Thursday, Oct. 10 at 8/7c on The CW.

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Jared Padalecki and Jensen Ackles, <em>Supernatural</em>Jared Padalecki and Jensen Ackles, Supernatural