Jonathan David Cook

Big Guy (voice)

Pamela Adlon

Rusty (voice)

Jim Hanks

Dwayne Hunter (voice)

Gabrielle Carteris

Dr. Erika Slate (voice)

Stephen Root

Dr. Donovan (voice)

Kathy Kinney

Jenny (voice)

Kevin Michael Richardson

Garth (voice)

M. Emmet Walsh

Mack (voice)

R. Lee Ermey

General Thornton (voice)