RIVERDALE: "CHAPTER NINETY-NINE: THE WITCHING HOUR(S)"

The CW has released images and details from "Chapter Ninety-Nine: The Witching Hour(s)," the episode of Riverdale airing on Tuesday, Dec. 7.

Here's how the network describes the episode:

"As Bailey's Comet passes over Rivervale, Cheryl (Madelaine Petsch) and Nana Rose (guest-star Barbara Wallace) revisit the tragic stories of the Blossom women through the years. Meanwhile, the once-in-a-lifetime celestial event prompts Cheryl to summon a familiar face to Rivervale -- Sabrina Spellman (guest-star Kiernan Shipka)."

James DeWille directed the episode, written by Arabella Anderson

Click on the thumbnails for larger images.