There's a fan theory that states that Monk and Psych might exist in the same universe. This theory was fueled by the two shows’ similarities and the Monk reference in the Psych season 8 finale.

Madeleine Spencer first appears in Psych season 3, episode 1, although her appearance was hinted at in the season 2 finale. Beyond Henry's lessons, Shawn also has an incredible tonal memory ...