"Night Fall" is the twenty-sixth of Yin Yang Yo! It premiered on April 30, 2007 and is the final episode of the first season.
Coop has captured Master Yo for the wicked Night Master. Yin and Yang seek help from Roger Jr. and Carl. But when it seems Carl can't be trusted, Coop offers to help the heroes search for the broken Toilet Brush of Illumination so the students can defeat the Night Master.