Chapter Fifty-One: "Big Fun"

S3 E16: As rehearsals for this year’s musical, “Heathers: The Musical”, get underway, Cheryl (Madelaine Petsch), as queen bee Heather Chandler, channels her own HBIC to deal with a recent fallout. Meanwhile, Betty (Lili Reinhart) grows increasingly annoyed by Evelyn’s (guest star Zoé de Grand’Maison) involvement with the musical – as well as the lives of her friends. Elsewhere, Veronica (Camila Mendes) learns some devastating news about her family, and Archie (KJ Apa) and Josie (Ashleigh Murray) make a decision about their future. Lastly, Jughead (Cole Sprouse) makes a surprising move against Gladys (guest star Gina Gershon). Marisol Nichols, Mark Consuelos, Skeet Ulrich, Casey Cott, Charles Melton and Vanessa Morgan also star.