Watch a clip from next week’s all new episode of Supernatural, titled “Goodbye Stranger,” below.

In this clip, Sam and Dean are talking to Castiel, who admits to searching for the other half of the demon tablet — as Kevin only has one half of the tablet, which he used to decipher the three tasks from God to shut the gates of Hell permanently. Castiel also reveals that Crowley is looking for Lucifer’s Crypts, of which there are supposedly dozens.

When Sam asks what is contained in the Crypts, Naomi orders Castiel to lie, so he invents a story about the Crypts containing parchment that can be used to decipher the tablet without a prophet (like Kevin). He then plans to interrogate a demon they have captured in the hope of finding out about the location of the Crypts, which have been lost to time.

Once Castiel leaves the room, Dean and Sam discuss how Castiel has seemed off since his return from Purgatory — and Dean still wants to know how he escaped — though Sam points out that Dean has still been praying to the angel despite his reservations. Castiel then deadpans from the next room, “You know, I can hear you both. I am a celestial being.”

And if this clip isn’t enough to get you excited for the episode, we also have the episode synopsis, a batch of promo stills, and an extended promo.

“Goodbye Stranger” airs Wednesday, March 20 at 9:00 p.m. ET.