Episode Title:Personality Disorder/Stu is Good at Something.Episode Description:Tim's costume gets him in trouble at work and is diagnosed with a personality disorder by a child psychologist(Elliot Gould), which his boss wants to take advantage of; When Stu discovers he has a new talent after the elder O'Flaherty (J.K. Simmons) replaces the bar pool table with a ping-pong table, he takes on a tough challenger (Judah Friedlander).