"Yin Yang Who?" is the sixty-fifth episode of Yin Yang Yo! It premiered on April 18, 2009, and is the thirty-ninth episode in season two. It is the final episode in the series.
Eradicus makes his move to destroy the city after draining Yo's Woo Foo aura. Then he goes after Yin's. Both Yin and Yang embark on a quest to find their parents and retrieve a Woo Foo aura donation, which is the only way to save Yin.