Randall

Chuck (voice) / Customer (voice) / Jason (voice) / Kenny (voice)

Doctor

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)

Matthew (voice)

Dr. Bill Dowd

Craig

Self