Gateways to the Mind
Voltar
Frank BaxterHimself (as Dr. Frank C. Baxter)- Hadley CantrellHimself - Princeton University Psychologist (as Professor Hadley Cantrell)
Edwin MaxBill- Wilder PenfieldHimself - Director: Montreal Neurological Institute (as Dr. Wilder Penfield)
Peter BrownAristotle's student (sem créditos)
Karl SwensonHal - the Cameraman (sem créditos)