Ben-Baruch (3 episodes)
Daryl Camacho
ADIC Reynolds (2 episodes)
FBI ADIC Reynolds (2 episodes)
Leonard Weinglass
Roger Swindell (3 episodes)
Roger Gunn (20 episodes)
Sergeant Klein (3 episodes)
Ira Schirmer (8 episodes)
Sheldon
Graeme
Andrew Treaster (1 episode)
Jeremiah Sacani (54 episodes)
Dr. Bill Kendall (5 episodes)
Martin
Dr. Feinberg
Curtis Gates (11 episodes)
Subject #14
Peter Hartofilias
Tom Strickler (4 episodes)
Rob Harmon (1 episode)
Rob Harmon (3 episodes)
Dr. John Bonsaint (13 episodes)
Russell Krauss (6 episodes)
Dr. Freddy Epner
Steve
Scott Tucker (1 episode)
Dr. Brett Rushton
Charlie
Irv Kressel (2 episodes)
Louis Ironson / The Angel Oceania (6 episodes)
Radio Announcer (voice)
Donovan
Frank Carr (2 episodes)
Andy Bednarik (1 episode)
Officer Stewart
Dr. Spencer
Scott
Jordan Trainer
Veterinarian
Kaplan, INS
Lenny Meyer
Yehudah
Reporter
Childress
Mark Ferris (1 episode)
Nick Margolis (6 episodes)