According to Deadline, Eddie Izzard is joining the third season of the Showtime comedy United States of Tara in a major recurring role. Izzard will play Tara’s brilliant psychology professor who starts as a DID skeptic, but becomes fascinated with Tara as a subject, leading him to explore the condition further. Collette won an Emmy for her role on the show, whose third season will begin production mid-September in Los Angeles for a 2011 premiere.