- Season 3 Episode 20
CHAOS ON PROM NIGHT
Betty (Lili Reinhart) takes matters into her own hands after learning some unsettling news about her father. Mary (guest star Molly Ringwald) grows concerned by Archie's (KJ Apa) desire to take boxing to the next level. Elsewhere, Cheryl (Madelaine Petsch) runs into a roadblock during her campaign for prom queen, while Jughead (Cole Sprouse) and Betty's plan to confront the Gargoyle King takes an unexpected turn.