About the characters

- First appearances of the psychologist Hans Klotz, Rosa Petitjean and Christophe M’Bala.
- First episode in which Yumi virtualises her friends.
- Jeremy is gifted and struggles not to be sent to a special school more fitting to him; his parents wouldn’t miss the opportunity for him to have a big scholarship to a school for the gifted.

About errors

- How can Yumi communicate with Odd and Ulrich without the microphone?
- Just before the Krabe explodes, the leg Yumi cut off reappears.
- In one scene, the door barricaded by Jeremy and Mr Klotz isn’t there anymore!
- When Sissi enters her room, the handle of her door is on the right instead of the left.
- After Jeremy has communicated with Aelita and needs to call Yumi, it’s not his phone we see but Yumi’s.
- During the return to the past, the doors of the science building are open when they shouldn’t be, and the tree knocked down by the rats has disappeared.
- The psychologist tells Jeremy his name is Mr Simone, but according to official documents his name is Hans Klotz.
- Jim says that the science building is the only one without access to the sewers. In several episodes, the laboratory classrooms have sinks.
- Odd’s pants are entirely the one shade of purple when he watches Yumi (on her bike) ride through the rats, before Jim announces where they should hide, when he (Odd) and Ulrich fend off the rats in front of the science building and when he says “I’ll go.”
- During the battle, a platform is turned to a vertical position. At one point Aelita and Yumi are on a platform sticking out of it near the bottom. When the Krabes are defeated, they somehow manage to get to the tower and we don’t know how.

About the series

- French title: Enragés

- This form of attack is the same as in episode 12 “Swarming Attack”, episode 44 “Vertigo” episode 58 “The Pretender” and episode 74 “I’d Rather Not Talk About It”.
- First time XANA takes control of a living organism and changes the incline of a plateau in one of Lyoko’s Sectors.
- The activated tower is the same as in episode 4, “Log Book”.
- At the very end, when the psychologist is trapped inside by rats, he doesn’t have shoes; where did they go?

About references

- Yumi: “Game, set and match.”
This is the phrase used when a tennis match is won.

- Yumi (to Sissi): “Your carriage, Cinderella.”
She references the famous animated film by Walt Disney in which the young Cinderella is transformed by her fairy godmother into a beautiful princess.

- The puzzle the psychologist works on is none other than the well-known Rubik’s cube.

- Jeremy: “The shrinks decided that I have to take all kinds of tests tonight to determine what my IQ is.”
The Intelligence Quota or IQ is the result of psychological tests which can evaluate someone’s intelligence.