S6, E4: 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). Lili Reinhart Camila Mendes Cole Sprouse Madelaine Petsch Mädchen Amick Casey Cott Vanessa Morgan Charles Melton Erinn Westbrook and Drew Ray Tanner also star.