Justin Shenkarow

as Izzy (voice)

Alice Ghostley

as Coriba (voice)

Victoria Carroll

as Fortius (voice)

Kay E. Kuter

as Citius (voice)

Jeff Bennett

as Altius (voice)

Tress MacNeille

as Mom (voice)

Rob Paulsen

as Dad (voice)

Scott Menville

as Martin (voice)

Mike Simmrin

as Spartin (voice)

Jim Cummings

as Narrator (voice)