Help Choose The Ending of the “Clue”-centric 100th Episode of the TV Show “Psych” Christopher Moore, March 25, 2013 To celebrate the 100th episode of the long-running USA comedic detective series Psych, they’re allowing fans to dictate how the show ends live on the air. To find out more about the episode and how you can participate in the vote this Wednesday, hit the jump for details.