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list of invader zim episodes in order
SEASON 1
"Pilot"-never aired but made in 1999
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"The Nightmare Begins" March 30 2001
Hoping to never see him again, The Almighty Tallest send Zim on a "mission" to far off Earth.
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"Bestest Friend" April 13, 2001
Zim adopts an annoying best friend in order to appear more human.
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"NanoZIM" April 13, 2001
Dib sneaks into Zim's base, taking pictures and putting them on a floppy disk. Hoping to erase Dib's memory of where he hid the disk, Zim surreptitiously enters Dib's body to erase this memory.
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"Walk of Doom" April 6, 2001
Zim updates GIR's guidance chip, which he tests out in the big city. Unfortunately, GIR has removed the chip, leaving the duo stranded.
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"Germs" April 20, 2001
After watching a B-war movie, Zim becomes germophobic and dedicates his life to exterminating Earth's bacteria.
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04B "Dark Harvest" April 20, 2001
Zim harvests the organs of the school children to appear more human.
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05A "Attack of the Saucer Morons" April 27, 2001
A group of true believers steals Zim's ship and, after catching Zim trying to recover it, begin to worship him.
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05B "The Wettening" April 27, 2001
Zim searches for a water-proof paste to shade his water allergies so he can survive a water war with Dib.
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06A "Career Day" May 4, 2001
It's career day at school and Dib has been paired with a paranormal investigator. However, after discovering Zim is molting due to an equinox, Dib tries to convince his mentor to help him destroy Zim forever.
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06B "Battle Dib" May 4, 2001
Trying to get a permission slip signed, Dib must endure trials to gain access to his father.
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09A "A Room with a Moose" August 17, 2001
Zim hijacks a school bus and sends it into a wormhole, at the end of which lies a very large moose.
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09B "Hamstergeddon" August 17, 2001
Zim turns the class pet into a Godzilla-like creature in order to kill everyone in the city, but must team up with Dib when the giant hamster attacks his base.
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08B "Invasion of the Idiot Dog Brain" August 24, 2001
GIR's brain takes over the base's operating system, and uses it to travel to the local taco restaurant.
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07B "Bad, Bad Rubber Piggy" August 24, 2001
Zim sends a series of rubber piggies back into the past to stop Dib from meddling with his plans in the future, but the piggies end up causing trouble for Zim.
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07A "Planet Jackers" August 31, 2001
Zim attempts to stop two planet thieves who intend to burn the Earth in their sun
for fuel, therefore ending his mission.
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08A "Rise of the Zitboy" August 31, 2001
Zim uses his hypnotic pimple to force Dib into revealing a weakness in Zim's base.
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10A "Plague of Babies" September 7, 2001
Zim discovers that aliens who look like babies are living on Earth. When they decide to take Zim's ship to return to their homeworld, Zim must fend off the attack of "Giganto-Baby."
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10B "Bloaty's Pizza Hog" September 7, 2001
After Dib is kidnapped by Zim, Gaz goes to save him in time for family dinner at her favorite restaurant.
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12A "Bolognius Maximus" September 21, 2001
Zim infects Dib with a virus that gradually turns him into meat. Dib manages to infect Zim with his own virus so they must work together to find the cure.
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12B "Game Slave 2" September 21, 2001
Gaz is on the trail of a video game fan who took the game console that was rightfully hers.
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16 "Halloween Spectacular of Spooky Doom" October 26, 2001
As a result of experiments done by Dib, Zim and Dib are trapped in an alternate universe where the only escape is through Dib's head.
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14A "Mysterious Mysteries" March 22, 2002
Dib goes on the TV show Mysterious Mysteries to tell the world the story of Zim. To Dib's surprise, Zim, GIR, and Gaz also appear on the show also to tell their sides of the story.
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15B "Future Dib" March 22, 2002
Zim uses a robot Dib to capture the real Dib while he attempts to destroy the earth.
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11A "Door to Door" March 29, 2002
Zim utilizes virtual torture and destruction in order to sell candy bars for the school fund raiser.
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11B "FBI Warning of Doom" March 29, 2002
Zim sees an FBI warning on a rented video and fears that his mission is threatened unless he returns the video immediately. At the mall, he faces the head of mall security.
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13 "Battle of the Planets" April 5, 2002
Zim and Dib discover that two of the planets in the solar system are actually spacecraft created by alien civilizations, and use them to battle each other.
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14B "Abducted" April 12, 2002
Zim and GIR are abducted by aliens as human and dog specimens. Escaping isn't difficult, as the aliens have only managed to stop one specimen from escaping in the past.
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17A "The Sad, Sad Tale of Chickenfoot" April 12, 2002
Dib sets out to disprove the legend of the Chickenfoot, who is actually a man stuck inside a chicken costume.
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19B "Megadoomer" April 26, 2002
Zim is accidentally shipped a high-powered robot with a cloaking device and he immediately heads off to kill Dib with it.
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18A "Lice" April 26, 2002
A lice hunter comes to the school to investigate an outbreak of headlice. She soon discovers that the only one who is immune to the infestation is Zim.
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20 "Tak: The Hideous New Girl" May 10, 2002
A pretty new girl, Tak, joins the class and is instantly beloved by all the other children. Zim thinks she's in love with him until she reveals that she's Irken and has come to destroy Earth to impress the Tallest and take his mission. Intended to be the season finale, it was aired out of order.
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17B "GIR Goes Crazy and Stuff" May 24, 2002
Zim adjusts GIR's behavior but things go wrong when GIR sees Zim as a threat to their mission on Earth.
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19A "Dib's Wonderful Life of Doom" May 24, 2002
Zim simulates Dib's entire life to find out whether or not he threw a muffin at Zim.
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15A "Hobo 13" July 12, 2002
Zim is sent to training planet Hobo 13 by The Tallest to take a series of tests and prove he is worthy of new equipment
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18B "Walk for Your Lives" September 28, 2002
Zim causes a very slow explosion and must put it out before it destroys the city and his base. Originally intended to air alongside Hobo 13.
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9 "The Most Horrible X-mas Ever" December 10, 2002
A snowman in the future tells children the story of Zim (referred to as "Zam") and Dib ("Doob")'s battle at Christmas. After the series was canceled, this episode was planned to act as the series finale.
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21 "Backseat Drivers From Beyond the Stars" June 10, 2006
Dib tries to stop Zim from bringing The Tallest to Earth while The Tallest themselves have to deal with the resistance against Operation Impending Doom 2. Originally intended to be the season 2 premiere, it was long delayed until 2006.
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22A "Mortos Der Soulstealer" June 17, 2006
Dib summons a mystical beast to attack Zim, but the beast is easily distracted.
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25A "Zim Eats Waffles" June 17, 2006
Dib manages to get a spy cam into Zim's base, but all he manages to show anyone is Zim eating Gir's waffles.
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22B "The Girl Who Cried Gnome" July 15, 2006
A girl gets stuck in Zim's yard, attracting unwanted attention from neighbors, the press and the Earth president.
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25B "Dibship Rising" July 15, 2006
Dib downloads his personality into Tak's ship, but the ship soon thinks that he is the real Dib, then Zim reminds the ship that he is Irken and attempts to throw Dib into the city sewage plant.
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24B "Vindicated!" July 22, 2006
Dib believes that someone finally believes him when he says Zim's an alien.
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24A "The Voting of the Doomed" July 22, 2006
Dib has to stop Zim from winning the school election.
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26 "Gaz, Taster of Pork" August 12, 2006
Dib uses an ancient spell drive to cast a spell on Gaz that makes her constantly taste pork.
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23 "The Frycook What Came from All That Space" August 19 ,2006
Zim's former master from Foodcourtia arrives on Earth to take him back to his sentence of hard labor
Unfinished EpisodES
All episodes after "The Frycook What Came from All That Space" were scrapped in mid-production. A handful of recordings by the series voice cast exist for some of these unfinished episodes, and the scripts for many can now be found on fansites on the web. Most of this material was also released with the Invader Zim 'house' DVD box set as a special edition disc. Jhonen stated in the audio commentary that had the show continued, it would have leaned more towards a sci-fi styled show, with more space battles along the lines of Backseat Drivers from Beyond the Stars.
