Supernatural season 9, episode 4 “Slumber Party” airs tonight. Charlie returns as the Winchesters learn that there is such a place as Oz.

The Road So Far

Dean formed an unlikely alliance with Ezekiel, an angel who was wounded in the fall, to save a dying Sam. Ezekiel possessed Sam to heal him from within, while also healing himself. However, Ezekiel’s presence within the younger Winchester remains a secret.

On the demonic front, the Winchesters held Crowley captive in the hope of getting the names of all the demons and their vessels on Earth. Meanwhile, Abaddon was resurrected and started building an army to take over Hell for herself.

Castiel, on the other hand, is public enemy number one for many fallen angels who blame him for the fall. After the Winchesters saved him from a Reaper, Ezekiel gave Dean an ultimatum: Castiel leaves the Men of Letters bunker or Ezekiel leaves Sam, thus condemning him to death. As a result, Dean told Cas that he could not stay with them.

Catch up with what you missed more in-depth with our recap of last week’s episode, “I’m No Angel.”

Watch a promo

‘Supernatural’ season 9, episode 4 ‘Slumber Party’ synopsis

If that promo has whet your appetite, make sure to read the official synopsis for the fourth episode of season 9:

FELICIA DAY RETURNS AS CHARLIE/SAM, DEAN AND CHARLIE MEET DOROTHY FROM OZ — Sam (Jared Padalecki) and Dean (Jensen Ackles) discover that the table in the Men of Letters house (the one that lit up like a Christmas Tree when the angels fell), has an ancient computer attached to it. They figure if they can get the computer on, they can track the angels. Who better to call for help than the best IT girl there is, Charlie (guest star Felicia Day)? While moving the massive computer, they dislodge a hidden hexbag that unleashes a magical green-webbed wall. Sam and Dean break through it and discover the one and only Dorothy (guest star Tiio Horn) from Oz. She had trapped herself and the wicked witch (guest star Maya Massar) in the web years ago to stop the witch from finding the key that would open the gate that connected their world with Oz. With the wall broken, a massive and magical fight ensues that threatens to destroy the Men of Letters house. Robert Singer directed the episode written by Robbie Thompson (#904).

If you need more goodies to tide you over, we have promotional stills from the episode as well.

Watch a clip from the episode

We also have a clip from the episode, in which the Winchesters learn that Charlie has been hunting, much to their chagrin. But she has a bigger reveal that takes the brothers off-guard:

Watch ‘Supernatural’ season 9 online

If you’re unable to catch Supernatural season 9, episode 4 “Slumber Party” 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 8 days after broadcast on Hulu as well.

Will you watch ‘Supernatural’ season 9, episode 4 ‘Slumber Party’ tonight?