When Dexter's Latest Invention Malfunctions, The Boy Genius And His Energetic Sister Dee Dee Are Hurled Spiraling Through Time. From The Age Of Dinosaurs To A Futuristic World Of Robots, Dexter Must Repair His Faulty Time Machine Before The Space-Time Continuum Collapses. Dee Dee's Endless Curiosity Creates More Mayhem Than Dexter Can Handle, Turning Every Era Into A Wild Experiment Gone Wrong. Meanwhile, Mandark Schemes To Control Time And Prove He's The Superior Genius Once And For All. With Each Tick Of The Clock, Dexter Faces A Hilarious, High-Stakes Battle Of Brains, Siblings, And Science That Could Change History Forever.
(After Enter The Florpus) Zim no longer has any reason to take over Earth. The tallest won't answer his calls, and he knows that they are not coming to Earth. Since he's stuck here, he decides to spend his time with Dib. But, they start to become a little more than friends.