What episode of Code Lyoko does odd get hurt?

In the episode "A Great Day," Odd gets hurt when he is attacked by a Krab while trying to protect his friends during a battle in the virtual world of Lyoko. This incident highlights the dangers the team faces as they navigate their fights against X.A.N.A. and the various monsters he sends against them. Odd's injury serves to emphasize the stakes involved in their mission to save the world from X.A.N.A.'s threats.