Randall
Doctor
Chuck (voice) / Customer (voice) / Jason (voice) / Kenny (voice)
Self
Bob the Builder / Principal (voice)
Dr. Fenster (voice)
Munk (voice) / Crud / Munk (voice) / Crud / Munk / Wal (voice) / Crud / Gunk / Mama Munk / Munk (voices) / Gunk / Munk (voice) / Munk / Crud (voice) / Crud / Munk / Wal (voices) / Crud / Gunk / Munk (voice) / Crud / Munk / Monkhuahua (voice)
Neil
Reading Fairy (voice)
Lieutenant Jim Dangle
Top Cat (voice)
Thayer
Matthew (voice)
Salesman
Eddie the Computer (voice)
Dr. Barrett Ingold
Mike
Teddy (voice)
Dr. Bill Dowd
Tom
Customer (uncredited)
Craig
Pete
Eric
Larry Murphy
Carl Halabi
The Priest
Mr. Murphy
Roger Walker
Charles (voice)
