Archie's Weird Mysteries - Season 1 Episode 5
Attack of the 50-ft Veronica

Veronica is less than kind to Jughead for being different. She couldnt stand if she were different; nobody would like her anymore. Upon going with Archie to visit Dilton, Veronica accidentally zaps herself with a recently invented growth ray, which so far seems to have had no positive results. And then, Veronica begins to grow -- and grow -- and grow, and suddenly shes more different from everybody else than even Jughead is.