Riverdale Season 3 Episode 20 : Chapter Fifty-Five: Prom Night

Betty takes matters into her own hands after learning some unsettling news about her father. Mary grows concerned by Archie's desire to take boxing to the next level. Elsewhere, Cheryl runs into a roadblock during her campaign for prom queen, while Jughead and Betty's plan to confront the Gargoyle King takes an unexpected turn.