Episode Overview
With the Skid out of commission and XANA’s Replikas overwhelming in number, Jeremie diligently develops his multi-agent system. Meanwhile, Aelita is plagued by nightmares of her father’s demise at XANA's hands. As Jeremie works, he receives a call from Franz Hopper, who arranges to meet on Lyoko. Although William offers to assist, the team remains cautious about trusting him again, leaving him in the lab with Jeremie. Once they meet, Franz transmits the crucial data for Jeremie’s project, but XANA retaliates by activating a tower to seize control of William and sending the Kolossus after Franz. Yumi bravely devirtualizes to confront William while the others guard Franz. After the data transfer is complete, Aelita and Odd race to Sector Five to finalize the program. Ulrich manages to defeat the Kolossus, but he is crushed by its falling body. A major obstacle emerges when the energy demands prove too high.