Ben Shenkman

as Eric Pasternak

as Aaron Sapiro

as Edwin 'Ed' Schlossberg (7 episodes)

as Lenny

as Daryl Camacho

as Leonard Weinglass

as ADIC Reynolds (2 episodes), as FBI ADIC Reynolds (2 episodes)

as Roger Gunn (20 episodes)

as Ben-Baruch (3 episodes)

as Sergeant Klein (3 episodes)

as Ira Schirmer (39 episodes)

as Sheldon

as Graeme

as Andrew Treaster (1 episode)

as Jonathan (4 episodes)

as Martin

as Dr. Feinberg

as Subject #14

as Peter Hartofilias

as Dr. Bill Kendall (5 episodes)

as Jeremiah Sacani (54 episodes)

as Russell Krauss (6 episodes)