When Zim attempts to taint the Earth’s cow-meat supply with sewer water is ruined because of Gir’s antics, he decides to increase the power on Gir’s behavioral modifier, which will permit him to stay in serious mode all the time. However, when the serious Gir starts to consider Zim a threat to the mission and runs off to learn things on his own accord, it’s up to Zim and Squidman to find Gir and turn down the power on his behavioral modifier before too many individuals see them and jeopardize their mission.

While at school one day, Zim throws another fit about the lunch food so Dib throws a muffin at him, which causes Zim to run away in anger. The next day, a pair of Meekrob come to Dib in his sleep and grant him marvelous super powers, in which Dib decides to use to put an end to Zim once and for all. When Dib manages to suppress Zim quite easily, he decides to use his power for the greater good and he lives out the wonderful life he always wanted to have; though perhaps it’s too wonderful.

An Irken masquerades as the new girl at school in order to settle an old score with Zim.

Zim descobre que os Altíssimos estão mais perto da Terra do que nunca e tenta convencê-los a conhecer seu novo plano de destruição do planeta. Os Altíssimos o ignoram e Zim decide tomar o controle da nave deles para dirigi-la à Terra.

Dib libera um espírito imortal para que ele o ajude a roubar a alma de Zim.

When Dib finally manages to get a spy camera inside Zim’s house, he plans to exploit the moment to show the Swollen Eyeball Network the truth about Zim’s nature. Unfortunately for Dib, Zim is more concerned with Gir’s waffles than his next evil plan, which causes Dib some complications as there is nothing special about waffles. However, when something out of the ordinary does occur, Dib believes he may just have a chance to succeed in his plans.

When a girl named Moofy comes to Zim’s house and attempts to sell him cookies, he freaks out and sends a robot gopher to get rid of her. However, when Moofy falls into a hole, the story breaks out and a crowd of people and a news agency shows up to cover the breaking events. Zim is worried because he doesn’t want his identity to be revealed, though he begins to formulate a method to exploit the moment to free Moofy and help him destroy the world.

When Dib discovers that Tak’s ship he recovered has a built in AI, he decides to reprogram the ship with his own personality. While Dib is quite pleased with initial results, the spaceship begins to behave more and more like the real Dib and it attempts to actually take his place. All of the attention of a huge spaceship going to school causes Zim to realize that it’s really Tak’s ship, so he plans to override the machines AI and order it to attack Dib; though can he really force a machine so smart to attack it’s counterpart?

Dib talks to a counselor about his belief that Zim is an alien.

Class elections find Zim running against a Dib-backed Willy for president.

Gaz develops an unhealthy fondness for the flavor of pork.

Zim's former boss is mad at him for leaving, so he kidnaps him and makes him work at his old job on the planet Foodcourtia.

Chega o Natal e Zim descobre que todos os humanos adoram o Papai Noel. Assim, ele resolve se fantasiar para fingir que é o bom velhinho e, dessa forma, conseguir dominar o planeta Terra de uma vez por todas.