Frank Baxter
Himself (as Dr. Frank C. Baxter)
Hadley Cantrell
Himself - Princeton University Psychologist (as Professor Hadley Cantrell)
Edwin Max
Bill
Wilder Penfield
Himself - Director: Montreal Neurological Institute (as Dr. Wilder Penfield)
Peter Brown
Aristotle's student (uncredited)
Karl Swenson
Hal - the Cameraman (uncredited)
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