Dexter is a boy genius. In his secret laboratory, Dexter takes on the greatest scientific challenges of his time. His biggest challenge, however, is keeping Dee Dee from ruining his inventions.

Dee Dee is Dexter's big sister and his biggest nuisance when it comes to the pursuit of scientific discovery. Dee Dee embraces everything whirly, twirly and girly in the world.

Dexter's sworn enemy proves that when it comes to competition, science isn't always fair.

Dexter's dad is happy-go-lucky and blissfully unaware of Dexter's extra-curricular pursuits. Dexter does his part to keep it that way.

Dexter's happy homemaker mom has no idea her son has a secret working laboratory in the house.