Supernatural season 9, episode 20, “Bloodlines,” airs tonight. The Winchesters hit Chicago in the backdoor pilot for the potential spinoff.

The Road So Far

The Winchesters learned Abaddon is harvesting souls across the country to make a demon army loyal only to her, leaving soulless humans on the rampage.

Meanwhile, Dean came in contact with The First Blade. He found the combination of it and the Mark of Cain overwhelming, and only Sam was able to break through the blade-induced bloodlust. Crowley then double-crossed the Winchesters, stealing The First Blade and telling them he would only give it up when the brothers were ready to kill Abaddon.

And Metatron captured Castiel in the hope of pressing him to lead the rogue angels — and play the villain in Metatron’s story. After the Winchesters exchanged Gadreel, whom they had captured, for their friend, Castiel finally agreed to lead.

Watch a promo

‘Supernatural’ season 9, episode 20, ‘Bloodlines,’ synopsis

If that promo has whet your appetite, make sure to read the official synopsis for the twentieth episode of the season:

SAM AND DEAN INVESTIGATE MONSTER FAMILIES IN CHICAGO – Sam (Jared Padalecki) and Dean (Jensen Ackles) investigate a case in Chicago, where they discover that various mafia-esque monster families are, unknown to humans, running the underbelly of Chicago. One is a family of shapeshifters run by Margo Lassiter (guest stars Danielle Savre), whose leadership is thrown into question when her brother David (guest star Nathaniel Buzolic) returns home. The other reigning family in town is made up of werewolves, lead by Julian Duval (guest star Sean Faris). While in Chicago, Sam and Dean meet Ennis (guest star Lucien Laviscount), a man with a personal vendetta against the monsters. The Winchesters warn Ennis about heading into the hunter lifestyle, but Ennis refuses to listen and starts down a dangerous path. Robert Singer directed the episode written by Andrew Dabb (#920).

If you need more goodies to tide you over, we have promotional stills from the episode as well. Also, be sure to read the episode writer’s comments about the potential spinoff here.

Watch a clip from the episode

Watch ‘Supernatural’ season 9 online

If you’re unable to catch Supernatural season 9, episode 20, “Bloodlines,” live tonight, you’re not out of luck. If you want to watch online, The CW posts new episodes of the show to its site the day after they air.

You can also find new episodes within 24 hours on iTunes and Amazon. The last five episodes to air on The CW are available eight days after broadcast on Hulu as well.

Will you watch ‘Supernatural’ season 9, episode 20, ‘Bloodlines,’ tonight?