Why Riverdale isn't ending the season tonight with a prom episode

ETonline

More than half of Episode 20, the big prom episode, was filmed before the coronavirus shutdown, says showrunner Roberto Aguirre-Sacasa. "So when it became clear that we weren’t gonna be able to finish the season, the first thing I kind of did was look at episode 20 to see if we could cobble together an episode from that," he adds. "And though we actually shot the prom, where a lot of dramatic stuff happened, there were so many emotional scenes with Archie and Veronica and Jughead and Betty that it felt like we just couldn’t quite do it." ALSO: Mädchen Amick used her Twin Peaks experience working with David Lynch in directing tonight's season finale.