S03E11: Chapter Forty-Six: The Red Dahlia

After one of their own becomes the target of an unseen assailant, the gang works together to get to the bottom of Riverdale's latest mystery. Meanwhile, Betty works with a surprising ally to piece together clues about a series of deaths in the town. Elsewhere, a spiraling Archie sets out on a new path, while Jughead comes face to face with Ms. Mulwray, Hiram's alleged mistress.