Invader ZIM

Zim, an Irken warrior, is dispatched to Earth under a covert mission, posing as a child at an elementary school to study humans. His operation remains undetected until Dib, a classmate fascinated by aliens, begins to suspect something is amiss due to Zim's unusual appearance.

Ms. Bitters informs the students that Parent-Teacher Night is approaching, requiring all parents to attend. Zim panics when he realizes his robotic parents are not ready to attend undetected, and he tries to prepare them, but Gir's unpredictable behavior threatens to expose their true nature.

Zim takes GIR to downtown to test a new guidance chip, but GIR removes it to carry a cupcake, leaving them lost. Their attempt to return home is hindered by Zim's temporary blindness, a mistaken identity as a bank robber, and a failed escape when GIR substitutes rocket fuel with tuna.

Zim becomes self-conscious after overhearing a student comment on his odd behavior and lack of friends, prompting him to try blending in by associating with Keef. After completing what he believes to be a successful integration, Zim attempts to distance himself from Keef, but Keef's persistent attention forces Zim to resort to extreme tactics to end the unwanted companionship.

Dib finally captures an image of Zim without his disguise, prompting Zim to shrink to microscopic size and infiltrate Dib's body to erase his memory. With help from his father's experimental technology, Dib attempts to stop Zim before he succeeds, though he must be cautious as he is now vulnerable with Zim inside him.

Inspired by an old film in which aliens are defeated by bacteria, Zim becomes obsessed with germs and initiates a campaign to eliminate them from his headquarters, aided by Gir's cleaning supplies. When the cleaner runs out, Zim faces the challenge of restocking while being acutely aware of the germ-filled world outside.

Dib discovers that Zim lacks human organs and tries to use Zim's "head pigeons" condition to get the school nurse to expose him as an alien. After Dib accidentally reveals his plan, Zim creates a device that allows him to replace objects with organs, secretly stealing his classmates' organs to pass as human for his nurse's appointment.

Zim takes his Voot cruiser for a test flight to observe Earth's police activity, but after a collision with a bee causes him to crash, he decides to retrieve the damaged ship the next day. Before he can do so, the Saucer Morons, a local space cult, discover the Voot, forcing Zim to devise a plan to reclaim it without exposing his true identity.

Zim becomes frightened when it starts to rain, as he has never encountered it before. Dib notices his reaction and learns that water causes Zim pain, revealing an unexpected vulnerability in the Irken race. Both Dib and Zim work to either exploit or overcome this weakness, leading to an unexpected confrontation.

Ms. Bitters uses an aptitude test and a machine to assign students their Career Day mentors, resulting in Dib being paired with a Paranormal Investigator and Zim being assigned to a fast food restaurant. Believing the restaurant's "8 billion served" sign indicates its leaders control the planet, Zim becomes determined to rise to power as Lord of All Humans. As Zim undergoes unexpected changes triggered by planetary alignment, Dib tries to take advantage of the situation, though both encounter outcomes they did not foresee.

Determined to expose Zim on the Swollen Eyeball Network, Dib needs his father's permission to present his findings, but finds it difficult to obtain as his father is preoccupied with his television show. Dib heads to the studio to get the necessary signature, only to discover that communicating with his father is more complicated than he anticipated.

Zim organizes a school field trip as part of a scheme for revenge against his classmates, particularly Dib. When Dib suspects something is wrong with the bus driver, his warnings are ignored due to his reputation for conspiracy theories. As Zim gloats about his plan, Dib struggles to stop him and save everyone, even as he remains puzzled by Zim's mysterious moose-filled room.

Ms. Bitters introduces a new hamster to the class, which quickly becomes a favorite among the students. Zim sees an opportunity and equips the hamster with an Irken device to make it grow and become controllable, but when the hamster escapes and grows out of control, Zim must stop it from destroying his base while also preventing a military response that could interfere with his plans.

Zim tries to upgrade the security system at his base but leaves Gir in charge while he replaces the AI. Gir's playful interference causes a system failure, shutting down the house and trapping him inside. Zim becomes concerned when Gir's AI gets uploaded into the central system, making him unpredictable and difficult to control.

Zim completes a space-time-object-transfer device and attempts to send a giant robot to the past to defeat Dib, but it fails to work. He tries a rubber pig instead, which accidentally alters Dib's past and causes unintended consequences. Zim continues sending more pigs, but eventually realizes that tampering with history has serious repercussions.

Zim becomes frustrated upon realizing his mission is not progressing as well as that of other Invaders, and he soon discovers that communication with his command hub has been cut off. He learns that Earth has been taken over by the Planet-Jackers, an alien species that sustains itself by consuming planets. Determined to stop them, Zim sets out on a solo mission to save the planet, partly to ensure he is the one who ultimately destroys it.

Zim returns home upset after learning that Dib has discovered a weakness in his security system. Gir tries to cheer him by rubbing bacon oil on his face, which results in a pimple that Zim worries will compromise his mission. As the situation worsens, Zim discovers the pimple has hypnotic powers and sees an opportunity to use it against Dib.

Zim and Gir experience a malfunction in the Voot Cruiser, causing them to crash-land at their base. Upset that a human baby witnessed the incident, Zim insists on confronting the child, only to discover that the baby poses a greater threat than he initially believed. Zim must take action to stop the baby from achieving its mysterious objectives.

Dib believes he has discovered a way to infiltrate Zim's underground base but leaves to join his family for dinner, promising to return in time. When he doesn't show up, Professor Membrane waits for him, frustrating Gaz, who is eager to eat her favorite food. Determined not to miss her chance, Gaz sets out to find Dib, even if it means going to Zim's base.

Dib notices Zim not eating again and teases him by throwing bologna at him, which sticks to Zim's skin and causes him pain. Seeking revenge, Zim causes Dib to sit on a tack, but Dib dismisses it as pathetic. Later, Dib begins transforming into bologna and realizes Zim's plan was more dangerous than he anticipated, needing to find a cure before it's too late.

Gaz becomes determined to purchase the new Game Slave 2 after seeing an advertisement, but her father insists she take Dib with her to the mall. Dib's insistence on waiting for *Mysterious Mysteries* to finish causes them to arrive late, frustrating Gaz. She tricks Dib into wandering into the underground parking lot while she tries to obtain the console, only to find the last copy already taken, prompting her to attempt to steal it, while Dib struggles to navigate the confusing and annoying environment of the parking lot.

On Halloween, Zim is frustrated by the town's enthusiasm for the holiday and wants to avoid Earth children at his house, while Dib, unknowingly trapped in a nightmare world caused by his father's invention, is sent to an asylum for his erratic behavior. After escaping, Dib confronts Zim, convinced that his alien enemy can help end the nightmare, despite their rivalry and Zim's reluctance.

The show *Mysterious Mysteries*, struggling with low ratings due to a lack of compelling stories, gives Dib an opportunity to appear on the program. Dib seizes the chance to expose Zim by showing a clip of their encounter in the woods, which impresses the show's host. The next day, Zim appears to refute Dib's claims, leading to a verbal confrontation as both try to convince the host of their version of events.

Professor Membrane introduces a revolutionary machine capable of eliminating the need for fuel, but its potential malfunction poses an existential threat to Earth. As he waits for his children before activating it, Dib is missing, trying to stop Zim from sabotaging the device. When Dib falls for one of Zim’s traps and the crowd grows restless, Professor Membrane sends Gaz to retrieve Dib and end his interference.

A school candy drive promises a secret prize for the top seller, prompting Zim to enter the competition with the goal of outperforming Dib, who also joins to ensure Zim's failure. As the contest progresses, Zim begins to consider extreme tactics to secure victory.

Zim becomes suspicious after seeing an FBI warning in a movie rented by Gir, leading him to believe something sinister is happening. He panics when the mall demands the video back and, after his computer suggests the FBI might be an alien-hunting group, he decides to investigate by returning to the mall.

Zim travels to Mars in search of a method to destroy Earth, inspired by what once wiped out Martian life. He discovers the face on Mars is actually the control panel of a massive spaceship, with the entire planet serving as its hull. Meanwhile, Dib tries to convince NASA to take his warnings about Zim seriously, but they refuse to look at the evidence on the monitors.

Zim is in the middle of reporting to the Almighty Tallest about the supposed intelligence and height of humans when his transmission is interrupted by an unexpected doorbell. Two strangers claim to be human, but Zim is skeptical and accuses them of interfering with his signal; they respond by capturing him and Gir and taking them aboard their spaceship. The episode follows Zim's efforts to return to his base and complete his report, as well as his reaction to being captured.

Professor Membrane hosts a gathering with his colleagues, who ridicule Dib for his interest in paranormal investigation. The situation worsens when a television show features "Chickenfoot," a paranormal entity clearly performed by someone in a costume. Determined to prove Chickenfoot is a fraud, Dib embarks on a mission to expose the deception and validate the importance of paranormal investigation.

The Almighty Tallest plan to send supplies to the Irken Invaders by dispatching a powerful Megadoomer Combat Stealth Mech to Invader Tenn and a box of defective SIR units to Invader ZIM. However, due to a mix-up caused by an angry slave, ZIM receives the Megadoomer instead and intends to use it to finally defeat Dib.

A child arrives at school with an itchy head, prompting Ms. Bitters to suspect lice. The infestation quickly spreads, leading the Delouser to declare martial law and quarantine the students. Zim, however, remains unaffected, drawing the Delouser's suspicion.

An Irken invader assumes the identity of a new student at Zim's school with the goal of seeking revenge against him.

Zim tries to sabotage Earth's beef supply using sewer water, but his plan fails due to Gir's unpredictable behavior. To prevent future disruptions, Zim boosts the power on Gir’s behavioral modifier, causing Gir to enter a constant "serious mode." However, this leads Gir to view Zim as a threat and go rogue, forcing Zim and Squidman to track him down and adjust the device before their mission is exposed.

At school, Zim becomes enraged when Dib throws a muffin at him after another outburst over the lunch food, causing Zim to storm off. Later that night, the Meekrob visit Dib and bestow him with powerful abilities, which he initially uses to try and defeat Zim. Finding Zim easily defeated, Dib shifts his focus to using his powers for good, eventually enjoying a life of heroism that may be more perfect than it seems.

Zim's persistent demands for advanced weaponry and equipment frustrate the Tallest, who remind him that as an Invader, he lacks the training of a battle soldier. To test his capabilities, they send him to the deadly elite training facility Hobo 13, hoping he will not survive. However, the Tallest soon realize that Zim is more resourceful and determined than they anticipated.

During Probing Day, Zim captures Dib in a space-time-field prison to conduct experiments for the Tallest, but a malfunction causes it to explode, leaving Zim with a slowly expanding piece of the blast. Hoping to neutralize it by disposing of it in the city's cesspool, Zim finds the task more complicated than anticipated and must resort to unusual methods to succeed.

Zim attempts to conquer Earth by impersonating Santa during the holidays, but his plan begins to unravel as he starts exhibiting Santa-like traits. Meanwhile, Dib works to prevent Zim's scheme and save Earth from disaster.

Dib disrupts Zim's mission to retrieve the Almighty Tallest from Earth just as the alien prepares to launch an attack using mind-controlling parasites.

Dib calls upon Mortos der Soulstealer, a mystical entity that appears once every thousand years, to steal Zim's soul. When Mortos requires recharging before he can act, Dib helps him perform a series of bizarre tasks in an effort to finally defeat Zim. At the same time, Zim is busy executing a new scheme, prompting Dib's initial request for supernatural assistance.

Dib installs a spy camera in Zim's house to expose him to the Swollen Eyeball Network, but finds Zim preoccupied with Gir's waffles rather than plotting world domination. As nothing significant seems to happen, Dib struggles to find evidence—until an unexpected event offers him a potential opportunity to prove Zim's true intentions.

A girl named Moofy visits Zim's house to sell cookies, prompting him to send a robot gopher to drive her away. After she falls into a hole, the incident becomes a breaking news story, drawing public attention. Zim worries about his secret being exposed but starts planning how to use the situation to his advantage.

Dib reprograms Tak's recovered ship with his own personality, but as the AI becomes more like him, it begins to replace him in his daily life. As the ship's presence draws attention, Zim recognizes it as Tak's vessel and attempts to take control, forcing it to attack Dib. However, Zim questions whether the intelligent AI will obey his commands.

Dib seeks help from a counselor to address his growing obsession with the idea that his neighbor Zim is an alien.

Zim runs for class president, facing competition from Willy, who is supported by Dib.

Gaz becomes increasingly obsessed with the taste of pork, leading to concerning behavior and unintended consequences.

Zim is forced to return to his previous job on the planet Foodcourtia when his former boss, upset about his departure, captures him and compels him to work again.