Robert Culp . ... Dr. Wallace Breen ( voice)
Louis Gossett Jr. . ... Vortigaunt ( voice)
Michelle Forbes . ... Dr. Judith Mossman ( voice)
Michael Shapiro . ... G-Man ( voice)
Mike Shapiro . ... Barney Calhoun
Jim French . ... Father Grigori ( voice)
John Patrick Lowrie . ... Citizens/Misc. characters ( voice)
Mary Kae Irvin . ... Citizens/Misc. characters ( voice)
rest of cast listed alphabetically
Merle Dandridge . ... Alyx Vance ( voice)
Robert Guillaume . ... Dr. Eli Vance ( voice)
Ellen McLane . ... Overwatch voice ( voice)
Harry S. Robins . ... Dr. Isaac Kleiner ( voice)
