Dexter, a boy-genius with a secret laboratory, constantly battles his sister Dee Dee, who always gains access despite his best efforts to keep her out, as well as his arch-rival and neighbor, Mandark.

Christine Cavanaughas Dexter (voice)
Kat Cressidaas Dee Dee (voice)
Jeff Bennettas Dad (voice)
Kath Soucieas Mom (voice)
Candi Miloas Dexter (voice)
Randy Poffoas Rasslor (voice)
Dom DeLuiseas Koosalagoopagoop (voice)
Paul Williamsas Professor Williams (voice)
Genndy Tartakovsky
Chris Savino
Charlie Bean
Walt Dohrn
Chris Reccardi
Bill Wray