Jughead Jones; Hot Dog; Sabrina Spellman; Hilda; Zelda; Salem; Archie Andrews; Betty Cooper; Veronica Lodge; Reggie Mantle; Moose Mason; Midge; Dilton Doiley; Chuck Clayton; Mr. Weatherbee; Miss Grundy; Mr. Jones; Mrs. Jones
When Reggie hits Hot Dog with his car on an October night, Jughead brings him to Sabrina in the hope that she can save him. She decides to break the rules of magic and bring Hot Dog back to life. Unfortunately, the dog returns as a rabid creature and bites Jughead, leading him to contract a strange illness. By Halloween night, Jughead has transformed into a zombie.
Jason Blossom; Cheryl Blossom; Veronica Lodge; Betty Cooper; Dilton Doiley; Jughead Jones; Ethel Muggs; Mr. Lodge; Pop Tate; Nancy Woods; Ginger Lopez; Archie Andrews; Reggie Mantle; Moose Mason; Mr. Weatherbee; Miss Grundy; Kevin Keller; Chuck Clayton; Midge Klump; Mr. Jones
Zombie Jughead arrives at the school dance and infects Ethel, Mr. Weatherbee, and Miss Grundy, leading to chaos and confusion. After locking Jughead in the locker room, the gang leaves the dance and heads for the Lodge mansion. Meanwhile, a zombie Mr. Jones attacks Nancy and Ginger inside Pop Tate's.
After arriving safely at the secured Lodge Mansion, Archie heads out to check on his parents. Meanwhile, Veronica hosts a pool party, which is disrupted by the zombified Moose and Midge, while Ginger and Nancy set fire to Pop Tate's and escape town on Pop's motorcycle.