Paul Benedict

as Walter Krasna (uncredited)

as Judge Womack

as Mr. Elinoff

as Tucker 'Smitty' Brown

as Finance Teacher

as Beaks

as Night Shift Guard

as Reverend Lindquist

as Butler

as Friedrich Hoffman

as Plunkett

as Arthur Fleeber

as The Mad Painter

as Not Guffman

as Martin Berg

as Hoakie (segment "Song of the Younger World")

as Mark

as Jeremy

as Harry Bentley

as Fairchild

as Brownlee

as Dr. Zook (voice) (uncredited)

as Kauldor

as Harry Bentley

as Ben Lockston

as Dr. Victor Loeb

as Mr. Ludlow

as Dr. Plotner

as Chestnut Man

as Orren Brooks

as Prof. Brainiac

as Magleby

as Zen Buddhist

as Arbuthnot

as Dr. Beineke

as Shots O'Toole

as Guido Fantoccini

as Lester Traube

as Hitchhiker

as Milo

as Hotel Clerk

as Warden Edward Dwyer

as Mickey

as Billy's Father

as Cosmo

as Rutherford Melon

as Wells Fargo Ferguson

as Malcolm Maltved

as Owner