Seasons & Episodes
Teddygozilla
A student named Milly seeks the comfort of her teddy bear after being embarrassed and ostracized due to her young age by
Seeing Is Believing
Odd decides to start a music band with his friends. But Jeremy can't play, so they try to hire a drummer. In the end, t
Holiday in the Fog
Ulrich and Jeremy are doing graffiti on a wall on campus while Kiwi wakes up Jim. When Jim passes Ulrich and Jeremy, Ulr
Log Book
Sissi has found something very special and dear to Ulrich, his diary! Unfortunately the diary contains some information
Big Bug
The day starts off when two girls are talking about Ulrich and then Sissi goes and interrupts and tells the girls that U
Cruel Dilemma
Jeremie is working on the materialization program, and finally gets it. Jeremie wants to matierialize Aelita, but reali
Image Problem
This episode starts out as Yumi and Aelita are running inside Lyoko looking for the activated tower. Then Yumi suddenly
End of Take
When a director comes to town to film a movie, XANA posseses a plastic alien model in order to destroy Ulrich and the ot
Satellite
When all the student's cell phone goes off in class, it starts Sissy on a petition to save her cell phone--but it's goes
The Girl of the Dreams
Jeremie mysteriously loses contact with Aelita. The same day, a new student named Taelia (who looks alot like Aelita) ar
Plagued
Jeremie learns that he has to take a test. If he passes, he'll get transfered to a new school and nobody will be able to
Swarming Attack
Ulrich is fussing over a mysterious letter found slipped under his door one night... a love letter signed by Yumi! Mean
Just in Time
The episode starts with Jeremie still trying to materalize Aelita. He calls the team to the factory to show them his la
The Trap
It's the anniversary of the day Jeremie and the others met Aelita. They begin planning a surprise for her, unaware that
Laughing Fit
After seeing laughing gas in Science class, Team Lyoko has to see it again - working for Xana. While working for Sissy
Claustrophobia
After a quick game of soccer, Yumi heads home for the night, but Odd and Ulrich head in for dinner, and Jeremie is alrea
Amnesia
When learning about NanoDoctors, small robots being designed to cure dieases, Ulrich holds some gel that the NanoDoctors
Killer Music
A new rock song Odd downloads sends him into a coma, and the same song is passed through the school. XANA's new beat is
Frontier
Jeremie is now taking his ""Materalize Aelita!"" campaign to levels unknown - quite literally. He virtualizes himself,
The Robots
Both Herb & Jeremy are in a robot competition Herb with ""Iron Sissy"", and Jeremy with ""Kiwi 2."" Herb cheats by laun
Zero Gravity Zone
Xana decided to get rid of everyone by using the power of Gravity, and Yumi, Odd, and Jeremy went to the factory, but Ul
Routine
Ulrich is getting tired of getting being rebooted so many times and waiting to find out if Yumi has feelings for him or
Rock Bottom?
Well, it starts off as Yumi wanting to have a party at her house. Of course, Odd jumps into action, and says that he has
Ghost Channel
One day at school, Jeremy notices that Odd, Ulrich, and Yumi are missing. Meanwhile, Odd, Ulrich, and Yumi ARE at school
Code: Earth
As Jeremy is perfecting his materialization program for Aelita, Yumi, Ulrich and Odd are making preparations for her arr
False Start
Aelita is materialized, but unfortunately, Xana implanted a virus inside of Aelita, so if Xana dies, so does Aelita. The
New Order
After discovering Aelita's link to the supercomputer and the inability to shut off the supercomputer that stems from it,
Uncharted Territory
While Aelita adjusts to her new life on Earth, Jeremie and the others investigate the mysterious owner of the Hermitage,
Exploration
After discovering The Carthage Region, the group decides to explore it. Yumi is forced to opt out after her continued la
A Great Day
After taking another trip to The Carthage Region and returning to the school, Aelita talks to Jeremie about not being hu
Mister Puck
When Aelita's dreams and hallucinations become too disruptive to ignore, the group heads to the Hermitage to discover th
Saint Valentine's Day
It's Saint Valentine's Day and love is in the air. Ulrich forgets, so at last minute writes a poem for Yumi. However, wh
Final Mix
When the school holds a concert in the gym, William accidentally drops a mixing board for the DJ contest. Odd offers to
Missing Link
During a mission to The Carthage Region, the Scyphozoa attacks Yumi, stealing her human DNA, having her trapped on Lyoko
The Chips are Down
When Ulrich learns that Yumi might have to go back to Japan because her father lost his job, he can't accept losing her.
Marabounta
After deciphering a part of Franz Hopper's diary, Jeremie gets an idea to make a monster that fights on the side of good
Common Interest
When the supercomputer's uranium power source begins to fail, Xana is forced to possess a local criminal named Peter Dun
Temptation
After a Xana attack, Jeremie insists on a return trip, regardless of the fact that Xana didn't even cause any damage. Wh
A Bad Turn
Ulrich and William get into a fight over Yumi. When Xana activates a tower and materializes Krabbes, he attacks Yumi's h
Attack of the Zombies
When Xana possesses Kiwi, it turns the little dog into the carrier for a virulent virus that turns those it infects into
Ultimatum
After Xana possesses the principal of the school and kidnaps Odd and Yumi, he gives Jeremie an ultimatum: deliver Aelita
A Fine Mess
After a malfunction and a little bug with the regular materialization program, Odd and Yumi are bugged up, ending up in
XANA's Kiss
Xana creates a ghost called a polymorphic specter, that can change its shape or form at will and doesn't need to possess
Vertigo
After a trip to the Carthage Region, Jeremie believes he has the data necessary to cure Aelita's virus. While the two wo
Cold War
Jeremy is woken up to an alarm signal, with no activated towers, so he goes back to sleep. The next morning, while Jerem
Déjà Vu
Aelita's visions become a problem once again, but not the same visions as before. This time, she has visions of her and
Tip-Top Shape
During the school physicals, Xana possesses the school nurse, Yolande, and has her kidnap Aelita. The rest of the group
Is Anybody Out There?
After reading about a dead man named Leon Corbe, who died during the construction of Kadic, Sissi decides to hold a séa
Franz Hopper
Jeremie discovers five activated towers and gathers the group to take care of them. However, when they arrive at the fac
Contact
During a short film made by Odd and starring Sissi, Sissi seems to be possessed by a ghost. She does not act as expected
Revelation
It's nearing the end of the year and Jeremie's research has hit a dead end. After the group collects some data from The
The Key
After going through all of Franz Hopper's diary, Jeremie discovers the truth behind the supercomputer, at least to some
Straight To Heart
After another three-week vacation, the group is still looking for a way to fight X.A.N.A.. X.A.N.A., meanwhile, is tryin
Lyoko Minus One
During a field trip with the rest of her 10th grade class, Yumi finds herself facing off against the students, teachers,
Tidal Wave
Xana attacks the Lyoko warriors by possessing a large amount of food. At the same time, he bugs up The Mountain Sector b
False Lead
When Xana hacks into a weapon's manufacturing computer network and leaves a paper trail pointing to Jeremie, government
Aelita
Aelita gets mad at Jeremie and she and Odd go into Lyoko without telling anybody, which causes problems. On lyoko, Xana
The Pretender
Odd and Ulrich are talking in the shower room when a young boy, Johnny, asks to talk to Ulrich. It turns out that Johnny
The Secret
After being rejected by Yumi, William makes it his mission to find out the secret she's hiding. Soon enough, he manages
Temporary Insanity
Before leaving Sector 5, Odd and Ulrich are hit by a weird red beam from a pair of Mantas. They both eventually begin to
Sabotage
When Xana sabotages the supercomputer, weird bugs begin cropping up in Lyoko. With its power rapidly draining, Jeremie n
Nobody in Particular
During a test to materialize Ulrich directly into Sector 5, his mind and body become separated, leaving Ulrich's body tr
Triple Trouble
When Odd complains that he doesn't have any cool powers on Lyoko like his friends, Jeremie designs him a teleportation p
Double Trouble
With Xana's attacks becoming more and more difficult to handle, the group contemplates adding another member to the team
Final Round
After William is initiated into the group, a series of events leaves only him and Aelita to defend Lyoko's core. During
William Returns
Using the data that Franz Hopper gave them, Jeremie and Aelita succeed in recreating Lyoko, which now holds only Sector
Double Take
In order to compensate for all of William, while under XANA's control, Jeremie sets to work designing new equipment for
Opening Act
Jim's nephew, Chris, the drummer of the Subdigitals, pays a visit to Kadic to look for an opening act for the band's nex
Wreck Room
There is a new recreation room at Kadic and William's clone is put in charge of it. Meanwhile, Jeremy has developed a pr
Skidbladnir
The new virtual, submersible "submarine" (as Jeremy calls it) is almost complete, the last step being a secondary progra
Maiden Voyage
The gang manages to convince Jeremy to let them test out the Skid. During this test, the navigation system bugs up, leav
Crash Course
Jeremy decides to teach Odd, Ulrich, and Yumi how to use the Supercomputer in case he or Aelita are unable to, being X.A
Replika
The group travels to one of X.A.N.A.'s replica sectors in the Digital Sea. Meanwhile, Aelita and Odd get into a fight af
I'd Rather Not Talk About It
The group turns to Jim for training, so they can be better prepared to fight against X.A.N.A.. However, things go bad wh
Hot Shower
When a comet passes near Earth, X.A.N.A. uses a laser-equipped military satellite to split it into chunks, simultaneousl
The Lake
Jeremy, Aelita, Ulrich, and Odd go with the rest of their science class on a field trip to an island in the middle of a
Lost at Sea
Hiroki steals Yumi's diary and Ulrich finds it. Meanwhile, in a new attempt to free William from X.A.N.A.'s evil clutche
Lab Rat
Jeremie has perfected his "Teleportation" process, allowing him to send his friends to the location of Xana's supercompu
Bragging Rights
Having failed to destroy X.A.N.A.'s supercomputer in the Amazon, the group sets out to finish the job. Meanwhile, Odd's
Dog Day Afternoon
Odd tries to take Kiwi to Lyoko, but ends up absorbing him instead. As a result, Odd slowly begins to take on dog traits
A Lack of Goodwill
Jeremy has developed a program to make the William clone smarter, but the learning curve is still problematic, as it tri
Distant Memory
It's holiday time at Kadic and everyone is headed home. Aelita, however, has no home to go to. As she watches over Lyoko
Hard Luck
When Odd breaks a mirror, a little bad luck follows and jinxes him everywhere, even on Lyoko. A bug in his virtual avata
Guided Missile
Jeremy wins a contest to take a flight in an armed fighter jet, even though it is Odd who entered him into the contest.
Kadic Bombshell
When Sissi's pen pal from Iceland, Brynja Heringsdötir, arrives at the school, all the boys swoon over her, making Siss
Canine Conundrum
When Kiwi's mindless destruction becomes too much for the group to bear, they force Odd to keep him at the factory. As O
A Space Oddity
Because of a surprise dorm inspection, Odd has to convince Yumi to keep Kiwi at her house. Jeremie, meanwhile, has locat
Cousins Once Removed
Jeremie's cousin, Patrick, comes to visit. Jeremie isn't entirely happy about it, since Patrick is "super cool" compared
Music to Soothe The Savage Beast
Aelita's first concert with the Subdigitals is coming up, but Aelita's stage fright threatens to get the better of her.
Wrong Exposure
Aelita finds a photo of herself with Franz Hopper at the Hermitage, with a mathematical equation in the background. Jere
Bad Connection
Odd is presenting one of his films, but is unhappy because his parents are coming. According to him, they never find fau
Cold Sweat
When an embarrassing picture of Yumi is printed in the Kadic newspaper, she turns to Odd as the source. He manages to ge
Down to Earth
In order to defeat XANA, whom they have vastly underestimated, Jeremie plans to design another multi-agent system to com
Fight to the Finish
With the Skid gone and XANA's Replikas at unmanageable numbers, Jeremie continues work on his multi-agent system. Meanwh
Echoes
With their mission completed, the group looks back on all their fond memories of Lyoko. Sissi, meanwhile, plants a track
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