The CW has released an official description with spoilers for the March 17 episode of Riverdale which is called “Chapter Eighty-Four: Lock & Key.” Here’s the write-up:
THE QUEEN OF CHAOS STRIKES AGAIN — A big announcement forces everyone to take stock of their current lives. Cheryl (Madelaine Petsch) sets a risky plan in motion after learning some surprising news about Toni (Vanessa Morgan). Jughead (Cole Sprouse) tries to make sense of a strange encounter he had. Kevin (Casey Cott) and Fangs (Drew Ray Tanner) make a big decision about their future together. KJ Apa, Lili Reinhart, Camila Mendes, Mädchen Amick and Charles Melton also star. Rachel Talalay directed the episode written by Arabella Anderson (#508). Original airdate 3/17/2021.
UPDATE: The CW has now released some promotional photos which you can find in the slide show below!