Riverdale Season 5 Episode 8 Chapter Eighty-Four: Lock & Key ( Air Date 2021-03-17 ) Genre Crime, Drama, Mystery category. Overview "A big announcement forces everyone to take stock of their current lives. Cheryl sets a risky plan in motion after learning some surprising news about Toni. Jughead tries to make sense of a strange encounter he had. Kevin and Fangs make a big decision about their future together.".