Invader Zim Episode 11 - BattleDib Episode Title:BattleDib.Episode Description:Dib desires to do a presentation about Zim for a meeting of the Swollen Eyeballs, a secret society which attempts to track down aliens and other such paranormal beings. The society requires that he must have a permission slip signed by his father, Professor Membrane, before he can do this though. Professor Membrane has a television show and Dib must endure various trials (including a Thunderdome) to gain access to his father. Dib fails the trials, but is successful in getting his father's signature. However, he cannot give his presentation as he lost his suitcase during the trail (which contained proof of Zim's alien heritage). This is the first of the three episodes to not feature Zim.