Code Lyoko - Season 2 Episode 12
Temptation

After a Xana attack, Jeremie insists on a return trip, regardless of the fact that Xana didnt even cause any damage. When questioned, he gets defensive and angry, insisting that its 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 Jeremies room to see what they can find about Jeremies 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. When hes about to be taken to the hospital, Xana attacks, possessing the ambulance and driving it towards the river with Yumi with him. Now the others have to save Jeremie and deactivate the tower without Jeremies help.