Boy genius Dexter wants to stay up and watch the 8 o'clock movie with his family, but his mother says he's not old enough. Using one of his inventions makes himself older, but maybe he's made himself a little too old.
In "Dexter's Rival", Dexter clearly shows disdain for a new kid in school, who has a lab just like his, albeit a bigger and more superior one. In "Simion", the result of an failed experiment vows revenge against the humans that did it. In "Old Man Dexter", Dexter makes himself older so he can stay up later.—Anonymous