Penelope kidnaps Archie and the gang and reveals that she was behind the board game shit, Chic was the Gargoyle King, Penelope kills Hal, I think Cheryl and her crew show up to save Archie and the gang, the cult people all disappear except for Kevin, Betty's mom was working for the CIA or FBI or whatever to infiltrate the cult, Betty and Jughead's brother Charles is a CIA or FBI agent or whatever, the gang goes to eat at pops, cut to a flashforward of their senior year where the gang is in their underwear in the woods burning their clothes and Jughead's beanie but Jughead isn't there
I think all of this was in the last episode
Riverdale is dumb as hell