Ranma ½: Season 1, Episode 80

1 - 80: Close Call! P-chan's Secret

Terrified that Akane has figured out that he's really P-Chan, Ryoga tries to leave the town forever. Ranma continues to try to figure out a way to beat Ryoga, while Akane tries to force him to tell her what he knows about the mark shared by Ryoga and P-Chan.