: Major characters who are firstborn children, including Archie Andrews, Jughead Jones, Toni Topaz, and Fangs Fogarty , drop dead instantly during the reception.

: Those who are younger siblings, such as Betty (younger than Polly and Charles) and Cheryl (younger than Jason), remain alive.

(Season 6, Episode 18) marks a pivotal, high-stakes shift in Riverdale , where the supernatural threats posed by villain Percival Pickens escalate into a full-scale reimagining of the Ten Biblical Plagues. Originally aired on June 26, 2022, the episode juxtaposes the town's struggle for survival with the celebratory, yet ultimately tragic, wedding of Toni Topaz and Fangs Fogarty. Narrative Overview & Key Events

: Percival systematically inflicts horrors upon Riverdale, including rivers of blood, swarming insects, lice, and painful boils. This culminates in a literal darkness falling over the town.