Kod Lyoko Sezon 2 Odcinek 26: The Key

Thanks to Franz Hopper's journal, which they have finally deciphered, Jeremy understands what the virus tying Aelita to XANA is -- a "fragment" of Aelita herself that XANA has stolen. They must get it back at all costs if they want to finally pull the plug on the Super-computer and destroy XANA! But Aelita has been thrown into confusion by some of the revelations about herself in Franz Hopper's journal. In a state, she risks her life by trying to switch off the Super-computer by herself. Jeremy comes to the rescue and manages to persuade her to take part in the final mission in Sector 5 to recover her missing fragment. The final combat against XANA is about to begin...