Supernatural First Look: Tessa's Back -- and Causing Angelic Unrest!

Castiel’s flock on Supernatural may not be so loyal after all.

On the May 13 episode (The CW, 9/8c), Tessa (guest-star Lindsey McKeon) returns when Dean discovers that the Reaper may be at the center of a conspiracy among Cas’ followers, and we’ve got a sneak peek at the hunter vs. reaper interrogation.

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Elsewhere in the gallery, Sam and Castiel find… the door to heaven? And Metatron and Gadreel go bowling?

Check out the photos and then head to the comments with your thoughts.