Entire series is on Youtube, commercial free(barring Youtube ads of course). Just search Code Lyoko official and you can watch all 95 Episodes and the two prequel Episodes. Got a favorite Episode? I waffle on this every time I'm asked this question because any given day it changes. Episode 9 is a favorite for a single Ulrich line regarding Odd(He indeed is nuts), Episode 38(Odd is nuts, Aelita edition), 42(self explanatory if you watch it), 51, 57 and so on. Each character brings something to the table but I think Aelita and Odd really do make that series.