Riverdale S06 E04 Chapter Ninety-Nine: The Witching Hour(s)

"To save the future, they must survive the past."

As Bailey's Comet passes over Rivervale, Cheryl and Nana Rose 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.