S3·E25 Tubby on Ice/Dr. X's Xtremely Xelent X-Ray Spex/Iggy's New Leaf

Tubby on Ice: Tubby skis down the a danger snow covered hill, that no one has made it down alive. Tubby amazingly makes it down alive, but is trapped by an avalanche. When Tubby awakes, he finds himself in the year 3999, where he is introduced to the world of the future by a little girl, who looks a lot like Lulu. Over a meal of hamburgers, Tubby explains to the girl that people in the past are afraid that in the future, the government will be watching your everymove, and you won't get any privacy, which unbeknownst to him is true. Pretty soon, the government brings him Tubby and sends through various tests. Afterwards, the girl over hears the scientists about removing Tubby's brain and disecting it. She then sends Tubby back to the past, but makes him swear to never to tell what he saw, for history would be jeopardized. Tubby then wakes up to find Lulu and Iggie remove him from the avalanche, and he then tells everything about the time machine in Miss Feeny's class.

Dr. X's Xtremely X