Dexter is hit by a wrench while working on a device, and suffers amnesia, Dee Dee decides to mess with his head

Dee Dee has a song stuck in her head. Literally.

Mandark drops technology and starts being more in touch with nature.

Dexter is tired of being short, since his old plan of growing himself didnt work, he decides to make everyone shorter than him.

Dee Dee starts layin' down the Judo on Dexter, then Dexter learns how to fight back.