Marshall Berenson

Detective Farber

Henry Correira

Theodore's Dad

C.E. Courtney

Zen Gottschalk

Frankie Frain

Vivian / Dr. Diplodocus (Voice) / Ezekiel (Voice) / Mr. I Dunno (Voice) / Dad (Voice) / Zen (Voice)

Brad Glanden

Theodore

E.J. Massa

Dr. Diplodocus / Lew "Android" Webber (Voice)

Maria Natapov

Stella / Daisy / Tina / Dunk (Voice) / Kay (Voice) / Theodore's Mom (Voice)

Alex Peacher

Arnheim