Invader Zim is an American animated television series created by Jhonen Vasquez. The show premiered on Nickelodeon on March 30, 2001. The series involves an extraterrestrial named Zim who originates from a planet called Irk, and his ongoing mission to conquer and destroy Earth. His various attempts to subjugate and destroy the human race are invariably undermined by some combination of his own ineptitude, his malfunctioning robot servant GIR, and a young paranormal investigator named Dib, one of the very few people attentive enough to be aware of Zim's identity.
This episode takes place in the future, in which a robotic snowman named Sludgy is telling children the story of the most horrible Christmas ever. It all started when Zim, Gir and Minimoose were on the streets trying to make money; he notices that fat men in red coats and white beards were making a lot of money. He captures one and he discovers the story of Santa Claus, in which he is amazed over how much power Santa has over the humans. Zim decides to create a giant Santa suit that he can use in order to pretend to be Santa, in order to have more power over the humans and become their ruler,so zim collects all info on santa and creates his suite, though Dib figures out Zim’s scheme and heads out to stop him in order to not only save Christmas, but to save the entire human race as well.
When Zim notices that the Almighty Tallest are very close to Earth, he wants them to view his newest scheme to destroy the humans: a monster that sucks out and eats the brains of people. The Tallest don’t care because they have their own problems to deal with, such as the group of resistance fighters that are trying to attack The Massive. Zim decides to take control of The Massive and force the Almighty Tallest to come to Earth, though his plans are interrupted when Dib uses Tak’s ship in order to take control of The Massive as well, not to mention the fact that the robo-parents are malfunctioning and that the brain eating monster is about to break free. Zim will need to work three times as hard if he wants to ensure his plan will be a success, though with the odds against him, will Zim be able to get the Tallest to Earth on time to witness his brilliance?
Dib summons Mortos der Soulstealer, a mystical being who emerges once every thousand years, in order to wish for him to steal ZIM’s soul. However, when it turns out that Mortos needs to recharge his power before he can complete the task that Dib requested, Dib must help him do many absurd things in hopes of putting an end to ZIM once and for all. Meanwhile, ZIM heads around town undergoing his latest evil scheme, which is the reason Dib was so eager to enlist Mortos’ help in the first place.
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?
When Dib messes up during gym class, he is forced to go see the skool’s counselor, Mr. Dwicky, in which Dib mentions what happened with Zim. However, when it turns out that Mr. Dwicky believes in Dib and proposes to work with him to prove Zim’s nature to the world, they forge a plan to lure Zim into a trap through the use of an alien translation device; however, Dib doesn’t realize the true nature of Mr. Dwicky’s intentions.
It’s time for the class elections at skool, in which Zim decides to participate in because he figures that if he wins the election, he’ll be one step closer to ruling the world. Dib wants to stop him but he knows that nobody would vote for him, so when Willy is nominated to compete against Zim, Dib decides to help Willy out in hopes that he’ll manage to defeat Zim in the polls. However, will Willy be able to do what Dib tells him, and even if he does, would he be able to prevent Zim from winning the election?
When Dib finally manages to get his book of spells somewhat fixed, he casts a spell on his sister in order to test and see if things work properly. However, when the spell makes everything Gaz eat taste like pork, Gaz threatens to destroy him if he doesn’t help her get back to normal. All their father could do was put Gaz in a cage and treat her like a freak so Dib goes off to ask the Swollen Eyeball Network if they have any advice on the situation; there is only one way Gaz can get her sense of taste restored: she must travel to an alternate dimension and get The Pork King to return her back to normal.
When Sizz-Lorr, the owner of a restaurant on Foodcourtia, captures Zim and takes him back to Foodcourtia to continue his banishment, Zim must find a way to escape Sizz-Lorr’s wrath. While Zim managed to escape once by going out the door, the restaurant has been upgraded with new security features that will make him explode if he attempts to leave. The Great Foodening is also about to begin, so if Zim doesn’t escape before it occurs, he’ll be locked on Foodcourtia for twenty years; will Zim manage to find a way out, despite the fact that Sizz-Lorr is quite confident in his ability to make Zim suffer?