In the episode’s shocking climax, Percival enacts the final plague: the death of the firstborn. After symbolically suffocating Nana Rose, the "oldest living firstborn child" in Riverdale, a wave of death sweeps through the town.
The episode centers on Percival's attempt to break the town's spirit by unleashing plagues to force Archie's construction crew back to work on his mysterious railroad. Riverdale s06e18
: Those who are younger siblings, such as Betty (younger than Polly and Charles) and Cheryl (younger than Jason), remain alive. In the episode’s shocking climax, Percival enacts the
: Jughead remains isolated in the bunker, writing stories to silence voices in his head. He eventually encounters his "Rivervale" counterpart, suggesting the barrier between dimensions is thinning. The Final Plague: Death of the Firstborn : Those who are younger siblings, such as
: Major characters who are firstborn children, including Archie Andrews, Jughead Jones, Toni Topaz, and Fangs Fogarty , drop dead instantly during the reception.