Code Lyoko: Season 3

In a prequel to "Teddygozilla", twelve-year-old Jeremy discovers a quantum supercomputer in an abandoned factory. Within, he finds that the computer runs a world parallel to Earth, a virtual world called Lyoko, along with an artificial intelligence Jeremy decides to name Maya. Jeremy tries to help Maya as much as he can with understanding what she is doing on Lyoko. With the Supercomputer active, strange events begin to plague Jeremy. He finds new friends he reveals the computer to. Additionally

Realizing the danger the Supercomputer represents, Jeremy takes the advice of his three new friends and decides to shut it down, but not before materializing Maya (Aelita) into the real world. Meanwhile, the strange events become a consistent problem when an electric orb begins hunting Jeremy and his friends. When the orb attacks Ulrich and Yumi, a stubborn Yumi demands to know what is going on, forcing Ulrich to take her to the Supercomputer with him. In a trip to Lyoko, Ulrich, Odd, a rebellio

After another three-week vacation, the group is still looking for a way to fight XANA. XANA, meanwhile, is trying to destroy Lyoko, preventing them from doing just that. He does so by targeting the core, which contains the code that maintains the virtual world. In a side story, Odd blackmails Jim into asking Principal Delmas to make Odd have the same classes as his friends. Additionally, Yumi decides against having a relationship with Ulrich and decides it would be better if they were just frien

During a field trip with the rest of her 10th grade class, Yumi finds herself facing off against the students, teachers, and bus driver, all of whom XANA has possessed. At the same time, XANA plans to get rid of Lyoko through alternate means: destroying each sector one at a time. To this end, he uses the Scyphozoa to possess Aelita and enter Code: XANA into the way tower, wiping out the Forest Sector completely. Jeremy then realizes that with the four main sectors gone, they will not be able to

Aelita gets mad at Jeremie and she and Odd go into Lyoko without telling anybody, which causes problems. On lyoko, Xana creates a diversion to get everybody to deactivate the tower in The Mountain Sector while the monsters (mostly Mantas and Creepers) worked on destroying the core of Lyoko. Jeremie and Aelita find a strand of DNA that belongs to Franz Hopper, indicating he may be still alive.

Odd and Ulrich are talking in the shower room when a young boy, Johnny, asks to talk to Ulrich. It turns out that Johnny likes Yumi, and being jealous of that, Ulrich tells him to follow her around to get her attention, which Yumi hates. After following her all day and ending up in the gym, a flock of crows possessed by Xana attacks Yumi. She is beaten unconscious by their electrified beaks and sent to the hospital. Meanwhile, as Jeremie and the others are fighting monsters to deactivate the tow

Aelita gets mad at Jeremy and she and Odd go into Lyoko without telling anybody, which causes problems. On Lyoko, XANA creates a diversion to get everybody to deactivate the tower in the Mountain Sector while the monsters (mostly Mantas and Creepers) worked on destroying the core of Lyoko. At the end of the episode, Jeremy and Aelita find a strand of DNA that belongs to Franz Hopper, indicating he may be still alive. Meanwhile, Odd is hit with the realization that his feet smell.

Odd and Ulrich are talking in the shower room when a young boy, Johnny, asks to talk to Ulrich. It turns out that Johnny likes Yumi, and being jealous of that, Ulrich tells him to follow her around to get her attention, which Yumi hates. After following her all day and ending up in the gym, a flock of crows possessed by XANA attacks Yumi. She is beaten unconscious by their electrified beaks and sent to the hospital. Meanwhile, as Jeremy and the others are fighting monsters to deactivate the towe

After being rejected by Yumi, William makes it his mission to find out the secret she's hiding. Soon enough, he manages to follow Ulrich and Odd to the factory and learns about Lyoko and XANA. Meanwhile, in the Ice Sector, the Scyphozoa possesses Aelita to enter Code: XANA in the way tower, but is devirtualized just in time by Yumi. The group thinks William's help is going to be quite useful, when a possessed demolition worker sets several bombs in the factory. They take a vote as to whether or

Before leaving Sector 5, Odd and Ulrich are hit by a strange red beam from a pair of Mantas. They both eventually begin to act strange in the real world during a school play. They start seeing their environment, people as enemies, and fight as if they were still on Lyoko. They are branded as insane and hospitalized while Jeremy tries to figure out what happened. After finding the cause and devising a cure, Jeremy has Yumi and Aelita break them out of the hospital. Meanwhile, XANA uses their hand

When XANA sabotages the Supercomputer, weird bugs begin cropping up in Lyoko. With its power rapidly draining, Jeremy needs to repair it before it becomes completely useless. However, he seems to forget about boys' dorm inspection, so Jim forces him to stay behind. Meanwhile, XANA possesses vines to trip up the rest of the group, except Aelita. Since the attack keeps draining power from the Supercomputer, with no other choice, Aelita purposefully wipes out the Ice Sector leaving only the Mountai

With Xana's attacks becoming more and more difficult to handle, the group contemplates adding another member to the team to make things easier. William is still the prime candidate, but Yumi still doesn't trust him. While Jeremie works on a way to get to Sector 5 directly, Xana makes a clone of him and has it take Jeremie's place. Meanwhile, Yumi has missed one too many classes, and will be expelled if she misses another. Odd and Yumi end up bugged by Jeremie's clone, preventing them from rescui

When Odd complains that he does not have any cool powers on Lyoko like his friends, Jeremy designs him a teleportation ability. It works, but ends up leaving duplicates of himself in the location he teleported from in the Mountain Sector. After trying it twice, Jeremy devirtualizes Odd to find out what went wrong, accidentally creating two clones of Odd himself. Meanwhile, in the real world, XANA attacks using a mysterious smoke turning anyone it hits to stone. One of Odd's copies gets turned to