Archie's Weird Mysteries (1999)

S01E37 Invasion of the Cockroaches

Pop Tate gives his restaurant a makeover aimed at attracting an adult crowd. However, chaos ensues when the town's grown-ups suddenly develop antennae and start speaking in robotic voices. Realizing the bizarre situation is beyond his control, Pop must turn to his old young customers for assistance in restoring normalcy to the town.