"Mr. Yin Presents" (stylized as "Mr. Yin Presents...") is the sixteenth and final episode of the fourth season of Psych, and the 63rd episode in the series overall. It premiered on March 10, 2010 on USA Network in the United States. The episode serves as the season 4 finale and is the sequel to the third season's finale, "An Evening with Mr. Yang". It is an important installment in one of the series' few story arcs.