Dean Pelton so his services could be used to help Abed Nadir . The study group attends the session with Abed and end up learning more about themselves and their current situation that they weren't prepared for. Dr. Heidi's first appearance was in the Season Three episode "Curriculum Unavailable". He is portrayed by actor/comedian John Hodgman.
In the study group's third year at Greendale, they were involved in instigating a riot in the school's cafeteria. After "Dean Pelton" put the entire blame for the incident on the study group the school board had them all expelled. Abed guessed that Ben Chang was behind their expulsion and had replaced Pelton with a look-a-like. He began investigating on campus role playing as The Inspector but was arrested by Officer Cackowski for trespassing on school grounds. In order to avoid "Pelton" pressing charges, Abed was asked to attend a therapy session with a Dr.Heidi in order put to rest his conspiracy theories. The group decided to accompany Abed for moral support.