Most people think the number 13 is terribly unlucky, but Supernatural returns Thursday, Oct. 12 for Season 13, and the CW drama series shows no signs of slowing down yet.

When we last saw Sam (Jared Padalecki) and Dean (Jensen Ackles), they were turning their sights toward defeating Lucifer (Mark Pellegrino) after handling the British Men of Letters. They managed to trap him in an alternate world, but not before he seemingly killed Castiel (Misha Collins) and took Mary (Samantha Smith) with him. Oh, and it was Crowley's sacrifice (Mark Sheppard) that closed the rip between worlds.

Here's everything you need to know about what's coming next.

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Calm down, Castiel isn't dead: Although Crowley is confirmed as actually-100-percent-totally dead, the finale wasn't the last we'll see of everyone's favorite angel; Collins is confirmed to appear in Season 13, though it's not clear in what capacity. Also, the season will pick up immediately where Season 12 left off.

Congrats, it's a man! Lucifer's fully-grown adult spawn will come to play a large role in Season 13. According to TV Line, Jack, played by new series regular Alexander Calvert, is essentially a blank slate at the start of the season, drawing guidance from the Winchesters, since they're who he's spending time with. Sam and Dean are technically the good guys, but they're not always good, which should make for some interesting storylines. Also, as the son of Lucifer and the human woman Kelly Kline, we wouldn't be surprised if Jack experiences his own inner battle between good and evil as the series explores nature versus nurture.

Mama Mary is going to cause problems for Sam and Dean (again): Though she remains trapped in the alternate world with Luci, Sam and Dean's bad-ass mama isn't gone for good. However, according to Variety, the series won't be spending a lot of time in the alternate world at the outset in an effort to focus on Sam and Dean. Still, the two storylines are obviously connected, and the brothers will hope to use Jack's powers to re-open the rip between the worlds to rescue Mary. Of course, the question of whether or not he'll do it remains unanswered.

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Samantha Smith and Mark Pellegrino, <em>Supernatural</em>Samantha Smith and Mark Pellegrino, Supernatural


Hey, do I know you? A number of people who are dead in the Winchesters' version of the world are alive and kicking in the alternate world. As previously announced, the archangel Michael will be back this season — well, sort of. Played by Christian Keyes this time 'round, he's described as a warrior who's already killed the Lucifer of his world. Producers previously hinted to TV Line that a former character whom the boys hadn't seen in a while would be returning to cause some trouble. Could that character be Michael? It definitely sounds like Michael.

But Michael isn't the only character returning in Season 13. According to Entertainment Weekly, Osric Chau will be returning this season to portray the alternate world's version of Kevin. Hopefully he's not evil. Please don't let him be evil, our hearts couldn't take it.

There will probably be more familiar faces — or familiar characters, at least — appearing this season, but fans should not look at this as a way for the long-running series to revisit its greatest hits, since not every character has a version in the alternate world. It's a world without Sam and Dean, after all.

Hell has a new boss: With Crowley dead and Lucifer otherwise unavailable, there's a vacancy to fill in Hell. Guest star Jeffrey Vincent Parise will appear in the second episode of the season as Asmodeus, a new prince of Hell who, according to the episode's logline, "sets his sights on Jack."

Spin-off version 2.0: This fall, Supernatural will attempt to launch another spin-off, Wayward Sisters, via a backdoor pilot. Featuring fan-favorite character Sheriff Jody Mills (Kim Rhodes), the spin-off follows several young female hunters in Jody's care who've been orphaned by supernatural tragedy. Briana Buckmaster's Donna Hanscum, Kathryn Newton's Claire Novak and Katherine Ramdeen's Alex Jones will appear, too.

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Scooby-Doo, where are you? What do you do when you're in Season 13 and done so much already, including an episode in which Sam and Dean travel to an alternate universe and are actors known as Jared Padalecki and Jensen Ackles who star in a TV show called Supernatural? Obviously, you team up with Scooby Doo for an animated episode.

If this episode doesn't end with Sam and Dean pulling a mask off someone's face and being utterly confused that it isn't a real ghost, someone's gonna have to pay. Look for the episode to air in the back half of the season.

Supernatural returns Thursday, Oct. 12 at 8/7c on The CW.

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