Nickelodeon's series Invader Zim has a pilot episode, 27 completed episodes, and several others that weren't complete at the time of the series' cancellation. As of August 19, 2006, all 27 episodes have aired. Most episodes are split into 2, each lasting half an episode. There are eight full length episodes.

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Season 1: 2001-2002

# Title Air date
0 "Pilot" December 24, 2011 (Made in 1999)
The Pilot episode of Invader Zim starts as Dib tries to prove Zim's an alien. Dib and Zim settle it with a food fight.
01 "The Nightmare Begins" March 30, 2001
Hoping to never see him again, The Almighty Tallest send Zim on a "mission" to far off Earth.
02A "Bestest Friend" April 13, 2001
Zim adopts an annoying best friend in order to appear more human.
02B "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.
03A "Parent Teacher Night" April 6, 2001
Zim makes use of his robot parents at the school's parent-teacher conferences.
03B "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.
04A "Germs" April 20, 2001
After watching a B-war movie, Zim becomes germophobic and dedicates his life to exterminating Earth's bacteria.
04B "Dark Harvest" April 20, 2001
Zim harvests the organs of the school children to appear more human.
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.
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.
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.
06B "Battle Dib" May 4, 2001
Trying to get a permission slip signed, Dib must endure trials to gain access to his father.
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.
07B "Rise of the Zitboy" August 31, 2001
Zim uses his hypnotic pimple to force Dib into revealing a weakness in Zim's base.


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.
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.
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.
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.
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.
08A "Rise of the Zitboy" August 31, 2001
Zim uses his hypnotic pimple to force Dib into revealing a weakness in Zim's base.
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.
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.
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.
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.
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.
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.
15B "Future Dib" March 22, 2002
Zim uses a robot Dib to capture the real Dib while he attempts to destroy the earth.
11A "Door to Door" March 29, 2002
Zim utilizes virtual torture and destruction in order to sell candy bars for the school fund raiser.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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
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.
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."

Season 2: 2002 & 2006

# Title Air date
29 "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.
22A "Mortos Der Soulstealer" June 17, 2006
Dib summons a mystical beast to attack Zim, but the beast is easily distracted.
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.
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.
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.
24B "Vindicated!" July 22, 2006
Dib believes that someone finally believes him when he says Zim's an alien.
24A "The Voting of the Doomed" July 22, 2006
Dib has to stop Zim from winning the school election.
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.
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
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.

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 Internet. 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.

Title Episode Notes Production Number
"Roboparents Gone Wild" Zim's Roboparents become aggressive parental figures. Zim is deemed "naughty" and is cast out of the house. The Roboparents take in an escaped zoo monster named Dinky as their new son, and Zim must team up with a hobo to reclaim his base.

  • The Hobo is the same one from "Gaz, Taster of Pork"
"Simon Says Doom" Mr. Elliot, Gaz's teacher, is running an orphanage care program. Zim agrees willingly to help out, which puzzles Dib. Dib immediately expects Zim to have some deeper motive, and decides to thwart whatever plan Zim's coming up with. Zim learns of the kids' game "Simon Says" while working with the orphans, and starts using the game for evil. His last command is "Simon says destroy everything!" Dib goes off to stop the raging kids. As it turns out, Zim really has his sights set on an "atomic diaper-changing machine", which he plans to make explode. Dib now has to either stop Zim or the raging orphans, and in his confusion, Mr. Elliot gives him detention for not watching the diaper machine. In the end, it turns out that Zim's plan all along was to confuse Dib into getting detention. 27B
"Invader Poonchy" Zim attempts to distract Dib from him by making it seem as though their classmate Poonchy is also an Irken Invader. 28A
"Nubs of Doom" Zim and Gir are disguised as clowns, and Gir starts going crazy and ruins the disguise. Disgusted by Gir's continuous failures, Zim decides to create a new assistant, employing Vortian weaponry obtained through Prisoner 777. Zim creates his new assistant/sidekick, a purple floating moose-creature which he dubs 'Minimoose'. After testing, he brings Minimoose into the field to battle Dib, only to realise in horror that he hasn't tested the weaponry, and he can't figure out how to use it. He goes home, declaring minimoose a failure. He hands Minimoose to Gir who pulls on his 'nubs' (legs) activating his weaponry and destroying Zim's base. 28B
"10 Minutes to Doom" Zim is in the schoolyard, walking home, when Torque throws a ball at him. This dislodges his Pak, which Dib quickly runs off with. Zim then tries to get it back, pursuing Dib, as it is revealed that an Invader can only survive 10 minutes without the Pak before dying. For the whole episode, a countdown is shown in the corner of the screen. Zim locates Dib by asking a 'skool' security guard to help. The security guard then finds Dib by using the tracking devices placed on every student.

Dib tries to get to Professor Membrane's lab to have him experiment on the Pak, with Zim chasing after him. Dib tricks Torque into attacking Zim, telling him that Zim called him a dookie-weenie. The three of them chase but eventually lose each other, with Dib escaping on a bus and Zim hiding from Torque in a sumo-wrestler's fat.At this point, Zim's Pak has attached itself to Dib as a new host, which begins to make Dib more like Zim. The two of them race to Membrane's lab, with Zim tricking Gaz into letting him ride on the back of her motorcycle (by stealing her Game-Slave and telling her Dib did it).Eventually they arrive, Membrane removes the Pak, and it is then taken by Zim, who places it back on himself at the last second.

  • Jhonen Vasquez planned for both Zim and Dib to actually die in this episode due to the series' upcoming cancellation, finding it to be a convenient end, but Nickelodeon didn't allow it in case they decided to bring the show back.
"GIR's Big Day" GIR is captured by some scientists for experimentation.

  • A script for this episode was never completed/written.
"The Return of Keef" Dib is in the school yard watching a child whom he thinks is a werewolf. Zim then appears and splashes Dib with a liquid that makes anyone happy explode. Not being incredibly happy (having just been drenched in goo) Dib's head does not explode, and Zim walks off. Keef then shows up and compliments Dib on his friendship with Zim, and finding out they are not friends, tries to bring them together. Fed up with Keef, Zim formulate a plan to get rid of him. They invite him to a restaurant and splash him with the happy-exploding juice. They then hug to make Keef really happy and he explodes, before reforming and fainting, with Zim commenting he'll be out cold for a few weeks. 31A
"Day of da Spookies" Dib is in class, giving a presentation on slug people, when he is horribly mocked by Zim and the other students. In a fit of rage, Dib tells the class everything he knows about Irkens. They don't notice, but the information shocks Zim, and he is clearly afraid of how much Dib knows.

Back at his base, Zim plans to ridicule Dib in front of the entire parascience community, in hopes of having him give up on paranormal investigation. Invader Skoodge then reveals that, since Blorch (and presumably Hobo 13), he has been living in Zim's basement. Infuriated by Skoodge's success, he refuses help and goes off with Gir and Minimoose. Their first plan (knocking on Dib's front door and declaring themselves to be 'bigfeets') fails, and they return to the base to plan another one. They make a set of ghost suits and leave again. In Dib's room, they cause chaos until he agrees to call up Mysterious Mysteries and have them appear on live TV. Mysterious Mysteries first sends in a specialist to confirm that they really are ghosts. As this could ruin their plan, Zim gets Gir and Minimoose to attack the specialist and launch him into space, before replacing him with Skoodge.

Skoodge then tests the three with various trials, such as their dancing abilities, before declaring them aliens. The news crews then arrive, at which point Minimoose and Gir cast off their disguises to reveal their true forms. Zim tries to, but the suit malfunctions and keeps him in costume. Thinking that Zim is a real ghost, the Mysteries group grab Zim and carry him away to be tested. They then place Dib in a bucket of rats for lying about there being three ghosts.

  • The script for the episode [1]
"Mopiness of Doom" Dib gives up on the paranormal to study real science like his father. Zim becomes bored with no nemesis, and Dib is unhappy with his new life. The two realise how much they need each other and promise to keep fighting till the end. 32A
"Those!" Zim attempts to take over the world with giant ants.

  • A script for this episode was never completed/written.
  • The title of this episode is a reference to Them!.
"Top of the Line" The Almighty Tallest hold a contest to find the greatest SIR unit, and Gir makes it into the finalists. Tak was scheduled to appear as the main villain, sabotaging the SIR units.

  • The final script for this episode has not yet been recovered from Nickelodeon, though it was completed.
"The Trial" Zim is put on trial by the Almighty Tallest for everything he's done to Irk in his life.

  • Several designs of this unfinished episode including Almighty Tallest Miyuki and Almighty Tallest Spork can be found at [2]
"It Feeds on Noodles" Zim becomes a vampire that must feed on Chinese food, with chopsticks for fangs.

  • A script for this episode was never completed/written.
"Pants! (When Pants Ruled!)" Zim attempts to take over the world with mind-controlling pants.

  • A script for this episode was never completed/written
  • This episode's plot was eventually recycled for Invader Zim comics Issue 8.
"Squishy: Hugger of Worlds" An enormous creature called Squishy that destroys planets by hugging them finds Earth.

"Untitled Season Finale (1)"

The two-part season finale was supposed to deal with Invader Tenn being captured by The Resisty and the rest of the Irken army attempting to save her. This episode is speculated to be "Invader Dib" by some fans of the show.

"Untitled Season Finale (2)" 40

''Invader Dib'' (TV movie)