Guest Stars Martin Cummins as Tom Keller Alvin Sanders as Pop Tate Peter Bryant as Principal Waldo Weatherbee Ryan Robbins as Frank Andrews Cody Kearsley as Moose Mason Tiera Skovbye as Polly Cooper Christopher O'Shea as Percival Pickens Alison Araya as Janet Weiss Greyston Holt as Glen Scot Caroline Day as Heather Alaina Huffman as Twyla Twyst Ana Mercedes as Abuelita Lordes Oliver Rice as Lou Cypher Maria Marlow as Gilda Snide Co Starring Nikolai Witschl as Dr. Curdle Jr. Tom McBeath as Smithers Trevor Stines as Jason Blossom Will Jackson as Anthony Uncredited Camila Mendes as Rivervale Veronica Lili Reinhart as Rivervale Betty Madelaine Petsch as Rivervale Cheryl Vanessa Morgan as Rivervale Toni K.J. Apa as Rivervale Archie Charles Melton as Rivervale Reggie Casey Cott as Rivervale Kevin Drew Tanner as Rivervale Fangs
