Code Lyoko - Season 2 (2005)

The gang is forced to continuously relive a day after X.A.N.A. is able to take control of the time-traveling mechanism. Meanwhile, Sissi attempts to blackmail Jeremie with a recording that she made of him conversing with Aelita about her true identity.

Aelita begins to experience her recurring nightmare while she's still awake, which leads to further investigation of the hermitage. As they continue to uncover more clues to this growing mystery in Lyoko, a deadlier X.A.N.A. infiltrates the group in order to get to Aelita.

In Aelita's room, she is having yet another bad dream. The man in red leaves a present outside her door. This gift from this stranger on Valentine's Day makes Aelita happy and Jeremie jealous. Meanwhile, Jim has caught the strange man. It turns out that he's been possessed by XANA. At the same time, gifts from Sissi and William place Ulrich and Yumi in a similar and awkward position. Things are not what they appear to be.

After repairing William's turntables and showing some mixing skills, Aelita is invited to DJ at Kadic's techno dance party. Spending her time in preparation for this event results in an argument between Aelita and Jeremie over what is important in life. Meanwhile, X.A.N.A. uses the school dance to stealthily go after Aelita.

In preparation for another trip to Carthage, Yumi is attacked by the Scipizoa and drained of a vital component needed for materialization into the real world. Now Yumi is stranded in Lyoko as the gang races against time to find a way to bring her back before X.A.N.A.'s next attack. Despite Jeremie's objections, Aelilta decides to sacrifice herself in order to save Yumi. Meanwhile, to prevent Yumi from getting in trouble with her parents and the Kadic administration, Sissi agrees to pose as her for the school pictures.

Yumi reveals to her friends that there is a possibility that she might have to go back to Japan as a result of her father losing his job. The thought of Yumi no longer being around proves to be too much for Ulrich. He decides to risk making X.A.N.A. stronger and his friendship with the rest of the group to prevent this from happening.

Using the concept of marabounta and some of Franz Hopper's research, Jeremie creates a program to search and destroy X.A.N.A.'s monsters. It appears to be a success until it targets Aelita and all of Lyoko for elimination. Meanwhile, Ulrich embarrasses himself while trying to upstage William for Yumi's attention.

The battery which powers the super-computer is running out of fuel, so XANA possesses a criminal to steal some uranium. Although our heroes want to stop him, they are forced to help XANA since Aelita's survival is also at risk!

After XANA's attack, Jeremie insists on a return trip, regardless of the fact that XANA didn't even cause any damage. When questioned, he gets defensive and angry, insisting that it's necessary. Further questioning on the matter leads to the same result. After the next return trip, Jeremie is found unconscious in his room. Yumi and Ulrich go searching through Jeremie's room to see what they can find about Jeremie's problem. Upon decoding a video diary that is stored on his computer, they learn that he had been using the return trips to increase his own intelligence. ...

Ulrich and William battle to impress Yumi during Drivers Ed at school, but they must find a way to put aside their differences and work together when XANA unleashes an army of Krabes in the real world.

XANA uses Kiwi the dog to spread a virus which turns people into zombies. As panic spreads everywhere, our heroes find a way to escape and get to the factory, in order to deactivate the tower before it's too late!

After XANA possesses Jean-Pierre and kidnaps Odd and Yumi, he gives Jeremie an ultimatum: deliver Aelita to the Scyphozoa or sacrifice Odd and Yumi. However, Jeremie and Aelita go to Sissi for help after being questioned by the police. Sissi agrees to be temporarily part of the group to help save her father and stop XANA.

After another successful mission on Lyoko, our heroes rematerialize, but the program has malfunctioned and switched Yumi and Odd's bodies. It seems funny at first, until they realize if not reversed, they could both disintegrate for good.

Love fever and jealousies have taken over the academy and threaten to separate our heroes forever. But even when they discover it's XANA's evil plan, can they overcome their jealousy in time to save Aelita from the Scyphozoa's clutches?

Ulrich's fear of heights is embarrassingly uncovered in gym class. Upset, he goes off to brood in the woods and Yumi and Odd try cheer him up. However, all is quickly forgotten when XANA dispatches a pack of wolves to wipe them out.

XANA takes control of the weather and sends temperatures plummeting so low that any outdoor exposure could cause breathing problems. Our heroes must come up with a plan to get to the factory and enter Lyoko to thwart their enemy.

Aelita's visions become a problem once again, but not the same visions as before. This time, she has visions of her and Franz Hopper being chased by government agents. The visions come even when she's awake, causing her to lose consciousness while at the pool. Wanting to know the source of the visions, she heads to the Hermitage to learn more about them. Jeremie discovers that XANA is causing the visions through her link to the supercomputer. During the mission to stop them, Aelita breaks away and heads to Sector Five, determined to discover the source of the visions.

During the school physicals, XANA possesses the school nurse, Yolanda, and has her kidnap Aelita. The rest of the group beats her to the factory, but has no way to get Aelita from the far more powerful nurse. Having no other choice, Jeremie decides to test out an experiment which will give a person the same powers as one possessed by XANA. To do this, he has to activate a tower like XANA. Jeremie's towers turn green instead of red. Odd volunteers, and is enhanced by a ghost of Jeremie's design. This allows Odd to fight the nurse effectively while the others deactivate...

After hearing strange noises, Sissi conducts a sÃfance at the school. XANA takes advantage of this and sends out a ghost, sending panic across the campus. Our heroes know this is the work of XANA, but can they deactivate the tower in time?

Jeremie discovers five activated towers and gathers the group to take care of them. However, when they arrive at the factory, they find a man at the interface, deactivating the towers as if it were a simple matter to do so. When questioned, the man claims that he's none other than Franz Hopper. However, something seems off about this convenient arrival. Franz says that the scanners cause cell degeneration, and blames it and the destruction of his diary on Jeremie. With everyone except Aelita angry at him, Jeremie calls his father and asks to be withdrawn from Kadic in...

During a short film made by Odd and starring Sissi, Sissi seems to be possessed by a ghost. She does not act as expected, however. Instead, she starts speaking in some strange language, focusing on Jeremie as she does. She is taken to the infirmary as a result. Later on, she walks into Jeremie's room and writes some code on a piece of paper. Jeremie translates the code, revealing a message stating a desire to help. Sissi is sent to the hospital after this, forcing Odd and Yumi to go there and collect her. On a trip to Lyoko, Aelita and Ulrich discover a white tower. ...

After the retrieval of vital information from the fifth sector, the gang returns to Lyoko so that Aelita and Jeremie can decode Franz Hopper's diary. X.A.N.A. sees this as a perfect opportunity to deceive the group and sabotage the mission.

With the end of the year school dance approaching, the gang sets out on a final mission to retrieve a vital component needed to cure Aelita. Tormented by the startling revelations concerning Franz Hopper and the origins of Lyoko, a troubled Aelita takes drastic action to finally rid the world of X.A.N.A.