Urusei Yatsura

Season 1, Episode 140

Episode Title: Lum-chan's Becoming a Cow?

Air Date: 1984-06-27

Overview:

Lum and Ataru are both bitten by a cow in a pet shop. Shortly afterward, Lum's horns begin to grow and resemble a cow's horns, and a horrified Lum believes she is turning into a cow.