Around the time this aired Eddie Cahill (Tommy) had a recurring role on another NBC show Friends (1994) as Rachel's assistant/boyfriend.
Mark Zimmerman (Attorney Katz) previously played the part of Mr. Dupree in episode 1.1, Payback (1999).
Dr. Emil Skoda (J.K. Simmons) mentions "folie à deux". This refers to "Shared psychotic disorder", a rare psychiatric disorder characterized by sharing a delusion among two or more people in a close relationship.