Chapter Fifty-One: Big Fun (S03E16)

Rehearsals for this year's musical, "Heathers: The Musical," get underway, and Cheryl, as queen bee Heather Chandler, channels her own HBIC to deal with a recent fallout. Meanwhile, Betty grows increasingly annoyed by Evelyn's involvement with the musical—as well as the lives of her friends. Elsewhere, Veronica learns some devastating news about her family, and Archie and Josie make a decision about their future. Lastly, Jughead makes a surprising move against Gladys. (CW Television Network)