The BEST episodes written by Laurent Turner, Sophie Decroisette
#1 - The Chips Are Down
Code Lyoko - Season 2 - Episode 9
When he learns Yumi may be leaving, Ulrich secretly goes back in time, in order to help her family, even though he knows this will make XANA stronger. Jeremy and Yumi decide he's gone too far and consider removing him from the group.
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#2 - Final Round
Code Lyoko - Season 3 - Episode 13
Aelita and new warrior William are forced to battle XANA while the others attend to their schoolwork. But when XANA wins the battle and turns William against the others, they must act quickly to save Lyoko in their most difficult battle.
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#3 - Temptation
Code Lyoko - Season 2 - Episode 12
Jeremy strangely continues to insist that the group keep returning to the past, despite knowing that it only strengthens XANA's powers. What they don't realize is that XANA has tricked him and now they must help him break this obsession.
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#4 - The Secret
Code Lyoko - Season 3 - Episode 7
William discovers Jeremy working in the factory and Jeremy attempts to go back in time to erase his memory. But when XANA attacks, it becomes impossible to go back and William must now help defeat XANA in the virtual world.
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#5 - Double Trouble
Code Lyoko - Season 3 - Episode 12
The students' grades are becoming affected by all the time they've spent fighting XANA, so they suggest adding William to the team, but Yumi is against it. However, the super computer's latest attack may be bad enough to change her mind.
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#6 - Tidal Wave
Code Lyoko - Season 3 - Episode 3
Xana attacks the Lyoko warriors by possessing a large amount of food. At the same time, he bugs up The Mountain Sector by rising the digital sea, but Odd and Aelita go to Sector 5 to stop him. Xana also mounts an attack on Lyoko's core at the same time.
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