Code LyokoΣεζόν 4 Αντικατάσταση εικόναςΑριθμός επεισοδίου11The LakeOverviewDuring a class field trip to an island in the middle of a lake, XANA conjures an aquatic monster to trap the students. However, Yumi, who stayed behind to do her schoolwork, is able to enter Lyoko where she must face William one-on-one.Air dateAugust 24, 2007Runtime (min)23