character - Judge Murdock

character - Doc Kemper

character - Dr. Matthias (uncredited)

character - District Attorney (uncredited)

character - Member of the Tribe

character - Dr. Randolph

character - Marshal Hunt

character - Mailman (uncredited)

character - U.S. Secretary Platt

character - Mr. Hillman

character - Academy Awards Attendee (uncredited)

character - Lowell

character - The Commissioner

character - Naturalists' Conference Chairman

character - First Explorer

character - Man Outside the Club (uncredited)

character - Mutate Council Leader

character - Dr. Pelham

character - Malcolm Smith [Ch. 10]

character - Mr. Creely (uncredited)

character - Dr. Graffner

character - Professor Krantz

character - Sam Foster

character - Ben Williams

character - Headwaiter (uncredited)

character - Parole Board Member (uncredited)

character - Farmer (uncredited)

character - Walt Beck

character - Senator (uncredited)

character - Paul Gordon

character - Chief of Police (uncredited)

character - Professor Graftner