About the characters

- Yumi owns colourful and interesting clothes that Odd wore while in her body.
- Ulrich plays heads or tails, and according to him, the smell of Odd’s feet is worse than his laser arrows.
- In this episode, we learn that Odd uses his laser arrows by visualising he’s shooting them, then concentrating. This contradicts the prequel episode “XANA Awakens Part 1” in which he fires his first arrow by accident.
- First and only time Odd rides the Overwing, and first time Yumi rides the Overboard (technically).

About errors

- During Ms Meyer’s class, the students often change place.
- The factory microphone disappears from Jeremy’s ear at the start of the episode.
- The colours of Odd’s pants are inversed when he gets ready to pick up his cup.
- The manhole cover in the park isn’t rusty when Yumi (in Odd’s body) takes it off.
- The halo of the tower Aelita goes into is red in one shot when XANA didn’t launch an attack in this episode.
- The top part of Aelita’s shoes is red instead of white when she walks under the arches with Yumi (in Odd’s body), Ulrich and Jeremy.
- The handle to Odd and Ulrich’s door is on the right instead of the left when Yumi (in Odd’s body) is in the corridor, and the door is brown instead of grey, like the other doors in the hallway.
- Odd (in Yumi’s body) can’t eat with chopsticks, but he had no trouble with it in episode 38, “Temptation”.
- In this episode, Ulrich and Odd swap beds and sleep with their heads where their feet would normally be. Odd’s stuff is also in the drawer under Ulrich’s bed.
- Aelita’s dress merges into her sweater when she sleeps in the lab, the whole thing being the one colour and missing some lines. It’s also drawn incorrectly when she asks what happened between Odd and Ulrich, the top part of her sweater being the same colour as her dress.

About the series

- French title: Désordre

- Only bug in the materialisation program (the only one without XANA’s interference, of course).
- First episode in which a Creeper isn’t destroyed by one only one shot.
- First appearance of Megatanks in the Ice Sector.
- First time we see the Transporter trip from the Ice Sector.
- In the original script, Odd did something much worse for Yumi and Ulrich’s reputation while on the steps outside the cafeteria: he didn’t hug Ulrich while in Yumi’s body – he kissed him! We’re not certain as to why the scene was changed, but we can guess.

About references

- Odd (in Yumi’s body): “I’m swimming through guacamole!”
Guacamole is a sort of avocado and onion soup, lemon-scented with a bit of cream. Coming from Odd, such a reference should be expected!

- Sissi: “Well, look who’s here! Romeo and Juliet!”
This is an allusion to the famous play by Shakespeare: “Romeo and Juliet,” written from 1594 to 1595. The two characters have remained universally known for their tragic love story.

- Yumi (in Odd’s body on Lyoko): “And now, let’s hear it for Catwoman!”
Catwoman is a character from the Batman series! The woman is a vigilante fighting in a cat suit!

- Odd (in Yumi’s body to William): “They call it a split personality, but nothing to worry about!”
A split personality can be a symptom of schizophrenia, a severe personality disorder.

- Yumi’s family eats sushi when Odd joins them for dinner in Yumi’s body. Sushi is a Japanese dish. Outside of Japan it’s one of the more emblematic dishes of Japanese cusine.