Due to all the noise being made by all the citizens of the city on a daily basis, the monster Magmanamus is awakened. However, when he goes to the surface to try and get the people to be quiet, he ends up causing even more noise since the people are frightened of him. Now, Monkey prepares to fight him, unaware that Magmanamus only wants peace and quiet, so he can sleep.
Dexter creates a "Mom-Droid" robot to have it do all of his mother's duties when she falls ill. But a little carelessness makes the control of the "Mom-Droid" fall into the hands of his sister, DeeDee. Now, the "Mom-Droid" is causing all sorts of havoc around the house, so Dexter builds a "Super Mom-Droid" to combat the original one he made.
Dexter had tried to excuse himself out of P.E. (with a fake note), but the new coach does not buy it, so Dexter is forced to play dodgeball, fed up with losing, Dexter builds an exo suit to help him win, but is ironically hit with a dodgeball by Dee Dee. This episode is clearly inspired by the film Aliens, as the exo suit that Dexter wears is almost identical to the loader Ripley uses against the Queen.
Tired of never having a worthy opponent, intergalactic wrestling champion Rasslor arrives on Earth hoping to find someone who can actually prove to be a match for him. So, he challenges all of Earth's superheroes to wrestling matches aboard his ship, which they anxiously accept. However, Rasslor refuses to wrestle Monkey due to his size, even though Monkey is the most eager to wrestle him.
The result of a space experiment, Simion, a super intelligent chimpanzee, plans to get revenge on humans for the way he is now. However, he teleports Monkey onto his ship in order to convince him to join him in his plan for revenge. After almost being convinced, Monkey attempts to show Simion that revenge isn't the answer.
Haunted by nightmares about Dee-Dee explaining to Einstein the purpose of meaning, Dexter decides to induce pleasant dreams into his mind scientifically. Using a barely awake Dee-Dee to operate his Dream Machine, Dexter embarks on a wondrous little adventure where he absorbs knowledge, learns all languages, and learns how to program a VCR. His dream goes well until Dee-Dee accidentally gives the machine a little nudge in the wrong direction.
Dexter's father gets challenged to an arm wrestling match against a local champion at a truck stop, when he causes the champion to lose for the first time, but refuses to do so even when he trashes the family car. He finally accepts the challenge when he slams the door in Mom's face. Dee Dee knows he'll get creamed, so Dexter builds him a robotic arm to help him win the match.
Dexter oversleeps and still has to finish his homework along with getting ready for school and eating breakfast, so he creates a helmet that expands thirty seconds into thirty minutes, but realizes that slowing down time is more detrimental than helpful. When he gets everything done, the helmet shuts off. But Dee Dee blocks his door causing him to miss the bus. When Dexter asks Dee Dee why, she replies "Snow Day, school's canceled!". Dexter realizes he did all that rushing around for nothing!
Dee Dee Locks and the Ness Monster—Dexter's mother forces Dexter to read to Dee Dee when she's sick, but she makes up her own story after being bored by Dexter's story (which was actually a science article). The story is completely mixed up and makes no sense. Dexter ends up catching Dee Dee's illness.
Dee Dee, LeeLee and MeeMee become crime fighters, but of course they will not actually fight crime.
After Dexter eats a giant burrito he believes he's going to die, so he makes a list of everything he must do before that time comes. (Including, make Mom and Dad happy, do dishes, free Robots, make World Peace, end World's hunger, learn to dance, make Dee Dee happy, shut down the Main System... and tell Mom and Dad about the secret laboratory).
When Blue Falcon appears with a destroyed Dynomutt, Dexter decides to build a new one.
Because of his exceptional grades Dexter's school and parents have decided that he can go to college. At first Dexter is happy to be there so he can fill his mind with college knowledge, but in the end the students influence on Dexter allows him to do college pranks sending him a one way ticket back to Huber Elementary School.
Mom and Dad are having a discussion while playing scrabble, a discussion that Dexter and Dee Dee don't interpret the right way.
While Mom, Dexter and Dee Dee are out shopping, Dad decides to spend the afternoon dancing... like Tom Cruise in Risky Business.
This second short, first aired as part the 56th episode, repeats in this one.
When Dexter is attacked by Robots hunting "The one who saved the future", he becomes fascinated by the possibility of what he will be in several years time, taking the Time Machine. Dexter arrives in the future where he finds many things have changed...and that his greatest invention holds the key to total tranquility around the world, but in the hands of evil, also holds the key to total domination of the world