Psych - Season 3 Episode 16 -

Serial killer Mr. Yin Yang who murdered 6 victims in 1995 resurfaces to play his cat-and-mouse clues games as he did with police officers back then. He has never been defeated and chooses Shawn as his next opponent and the clues come fast and furious to save a young woman. Each clue has to do with something in Shawn's past. Shawn also attempts to rekindle an old high school romance.