Christopher McCann

as Herschel

as Dr. Keller

as Brookie Sutherland

as Lyman

as Dr. Lynn

as Dr. Del Santo (2 episodes)

as Bookstore Owner

as Thad Ralston (1 episode)

as Friend of Mimi

as Howard Brightman (1 episode)

as Mr. Ullman

as Bruce Marx (1 episode)

as Michael Kirkland

as Dr. Henry

as Peter

as Dr. Brewer (1 episode)

as Kasseem

as David Kelp (1 episode)

as Edgar Hoover (1 episode), as Colin Gerard (2 episodes), as Drew Hamilton (1 episode), as Harvey Wellman (1 episode)

as FBI Agent Sam Russell (1 episode)