Ranma ½: Season 1, Episode 34

1 - 34: Assault on the Girls' Locker Room

Ranma is determined to infiltrate the Furinkan High girl's locker room when he gets a map from Ryoga that shows there's a old spring beneath it that can cure his curse. It proves harder than Ranma thought though, since the girls are on high alert due to the recent raids by Happosai.