Bern Cohen
Dr. William Lemmon
Reagan Leonard
Stephanie LaFarge
Nim Chimpsky
Self (archive footage)
Wer LaFarge
Self (archive footage)
James Mahoney
Self (as Dr. James Mahoney)
Cleveland Amory
Self (archive footage)
Anna May Marsh
Signing Girl: re-enactment unit
Sarah Sakaan
Renee Falitz: re-enactment unit
Dennis Lauricella
Beefy Guy: re-enactment unit
Robert Nesi
Beefy Guy: re-enactment unit (as Robert J. Nesi)
Scarlett Bermingham
Laura-Ann Petitto: re-enactment unit
Michael S. LePera
Wer LaFarge: re-enactment unit (as Michael LePera)
Peter Elliott
Nim Cimpsky - Reenactment Unit (uncredited)
