As rehearsals for this year's musical "Heathers: The Musical" get underway, 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.
Elenco: K.J. Apa , Lili Reinhart , Camila Mendes , Cole Sprouse , Madelaine Petsch , Mädchen Amick , Casey Cott , Mark Consuelos , Marisol Nichols , Ashleigh Murray , Charles Melton , Vanessa Morgan , Skeet Ulrich , Luke Perry , Erinn Westbrook , Drew Tanner .