Yumi is held captive in Lyoko while her evil clone attempts to destroy the heroes. Meanwhile, an unsuspecting Jeremy sends Odd and Ulrich to Lyoko to help Aelita deactivate a tower, but he ends up alone, face-to-face with XANA.
Stars: Sharon Mann, Barbara Scaff, David Gasman
Director(s): Jérôme Mouscadet, Paul Guidal
Writer(s): Sophie Decroisette, Ghislaine Pujol, Bruno Regeste