as Doc Kemper
as Dr. Matthias (uncredited)
as District Attorney (uncredited)
as Member of the Tribe
as Dr. Randolph
as Mr. Porter (uncredited)
as Mailman (uncredited)
as U.S. Secretary Platt
as Mr. Hillman
as Academy Awards Attendee (uncredited)
as O'Hanlon, Pinkerton Agent (uncredited)
as Lowell
as The Commissioner
as Naturalists' Conference Chairman
as Man Outside the Club (uncredited)
as Mutate Council Leader
as Dr. Pelham
as Malcolm Smith [Ch. 10]
as Mr. Creely (uncredited)
as Dr. Graffner
as Professor Krantz
as Sam Foster
as Ben Williams
