Chapter Ten: "The Lost Weekend"

S1, E10: When Fred (Luke Perry) decides to finalize the divorce with Archie’s mother Mary (guest star Molly Ringwald), Archie (KJ Apa) hides his true feelings. Archie tries to win Valerie (guest star Hayley Law) back with a romantic evening, however, Betty (Lili Reinhart) hijacks his plans when she decides to throw Jughead (Cole Sprouse) a surprise birthday party. Once Cheryl (Madelaine Petsch) learns of the party, she decides to make it interesting and things quickly get out of control. Meanwhile, Veronica (Camila Mendes) contemplates whether she should participate in the deposition to help get her Dad released. Mädchen Amick and Marisol Nichols also star. Molly Ringwald guest stars.