Dexter falls victim to one of his own inventions and sends Dee Dee back in time to warn his past self about the consequences, but the past Dexter proves hard to convince. / Monkey must defend the city from a giant underground lava monster, Magmanamus (Brad Garrett), who cannot sleep because of the noise created by its residents. / When his mother falls ill, Dexter creates a robot to do her chores. Dee Dee gets hold of its remote control and wreaks havoc, forcing Dexter to create a second robot to counter Dee Dee's.
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.
In this episode, Dexter makes a remote that turns people into animals, only for Dee Dee to get a hold of it. It first aired on February 26, 1995, and it re-aired as part of episode 4 of season one on May 19, 1996.
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