Aelita

Plot:

Aelita gets mad at Jeremie, so she and Odd go into Lyoko without telling anybody, which causes problems. Xana had created a diversion to get everybody to deactivate the tower in the mountain sector while the monsters worked on destroying the heart of Lyoko. Jeremie and Aelita find a strand of DNA that belongs to Franz Hopper, indicating he may be still alive.