|Dr. Jack Hattaras|
|Date of Birth||-|
|Number of episodes||-|
|Relatives||Tara Gregson (Student)|
|Portrayed by||Eddie Izzard|
Dr. Jack Hattarras (Eddie Izzard ) appears in season three as Tara's psychology professor. At first he is a DID skeptic, calling her a "delusional liar or an attention-seeking dramatist" in front of the class; however, after more observation he becomes fascinated with Tara as a subject, leading him to further explore the condition in hopes of writing a book. In the episode "Bryce Will Play ", Bryce tries to murder Jack by spiking his food with crab, to which Dr. Hattarras is deathly allergic. Jack's boss forces Dr. Hattarras to withdraw from Tara's life.