The Big Guy and Rusty the Boy Robot

Jonathan David...

as

Big Guy (voice)

Pamela Adlon

as

Rusty (voice)

Jim Hanks

as

Dwayne Hunter ...

Gabrielle Cart...

as

Dr. Erika Slat...

Stephen Root

as

Dr. Donovan (v...

Kathy Kinney

as

Jenny (voice)

Kevin Michael ...

as

Garth (voice)

M. Emmet Walsh

as

Mack (voice)