Polly Cooper is a recurring character on the TV show Riverdale. She is Bettys older sister and Jason Blossoms wife. Pollys disappearance case was a major plot in Riverdale season 5, and it came to a tragic conclusion when Betty and Alice found her remains in a junkyard. Polly died in season 5 from the Lonely Highway Killer. Her body was hidden in the trunk of a car, which was eventually found by Betty. In season 6, Polly was resurrected from the Sweet Hereafter by Cheryls magic powers. Polly appears in season 7 episode 16 as "Poly Amorous," a burlesque performer, and in the final episode of season 7, which is the final episode of the entire series.