When Ulrich tries to tell Yumi how he really feels after some prodding by the rest of the group, he finds her talking to William, who is doing the same thing Ulrich had planned to. Yumi turns him down, but Ulrich leaves before hearing it. Meanwhile, Xana activates a tower and materializes a Krabe. At school, a driving class has been set up to teach the kids road safety. William turns out to be a good driver and Ulrich a rather poor one, which William makes fun of him for. The two then get into a fight and get detention because of it. Jeremie learns of the activated tower shortly after and the group heads to the factory without Ulrich. During this time, the Krabe makes its way to Yumi's house. When the group reaches the factory, they find a second Krabe guarding it. Yumi learns of the first Krabe from Hiroki and goes to help while Odd distracts another Krabe so they can get to the elevator. In the scanner room, they learn that the first two Krabbes destroyed the scanners that produced them, leaving just one usable. Aelita goes to Lyoko first. Before Odd can go, however, a third Krabe is materialized, preventing any further use of the scanners. Now Odd has to deal with this Krabe, Ulrich and William have to deal with the second, and Yumi and her family have to deal with the first. Not only that, but Aelita has to make her way to the tower without any support, and makes a decoy for the Scyphozoa.
Elenco: Jodi Forrest , Allan Wenger , Paul Bandey .