S1·E1 Attack of the Killer Spuds

Jughead, after watching an entire movie marathon on television, calls into the station as part of a contest, and wins the odd prize of a potato. The next day, something seems different about old Jug, and he gives everybody gifts...more potatos. Soon it's realized that the potatos are being controlled by a powerful spud out for control of earth, and all of Riverdale's residents are being replaced by potatos acting as their clones! All except for Archie and Dilton, who must figure out a way to destory the potatos before it's too late.