About the characters

- Second time Ulrich blocks a Megatank laser with his sabre and first time the sabre breaks.
- Aelita doesn’t know what bowling is.
- Ulrich sleeps in on Sunday morning.
- Odd has shot a short film in which he ridicules Sissi and Jim.
- When Sissi is possessed by Franz Hopper, she speaks long and incomprehensible sentences! But are they really incomprehensible? He notice that when recording and playing the words in reverse, we find the same message word for word as the one Jeremy plays at the end of the episode!

About errors

- The principal’s eyebrows are grey when he see him near the camera.
- Aelita’s outfit is reversed when she types in the Code Lyoko.
- Odd’s phone antenna is on the right instead of the left when he tells Jeremy Sissi was sent to hospital.
- The colours of Odd’s pants are inversed when he sees the ambulance at the entrance to Kadic and when XANA-Chantal arrives at the factory.
- Odd’s undershirt disappears from his torso when he pulls Sissi from the wheelchair, when he, Sissi and Yumi notice that XANA-Chantal is still conscious after the ambulance fell, and when Jeremy tells Aelita to look out.
- The door handle to Jeremy’s room is inversed when Yumi enters to talk about Sissi and when Jim enters to take her to the infirmary.
- The marks under Sissi’s eyes disappear before Odd’s short film begins, when she sits on the chair in the lab and before Jeremy tells Odd how many life points he has left.
- The lift button on the factory ground floor is red instead of yellow and there are two instead of one when Yumi presses it, and the buttons in the left disappear when the XANAfied nurse holds Yumi against the wall.

About the series

- French title: Contact

- First mention of the Kadic News.
- First mention of the towers with white halos.
- Record beaten by a Krabe who took out 80 of Odd’s life points in one impact!
- The Superscan can’t localise white towers which appear in this episode.
- The Megatanks fire at the tower Franz activated like they did the Way Tower in the forest in episode 25, “Code Earth”.
- The ambulance the XANAfied nurse drivers is the same as the ones in 18, “Killer Music” and 38, “Temptation”.
- There’s no return to the past in this episode! Therefore, one wonders what the heroes did with the nurse and the damaged ambulance!

About references

- Odd: “Here comes Doctor Doom!”
Victor von Doom, also known as Doctor Doom, is a villain from the Marvel comic series Fantastic Four. He’s an inventor and sorcerer. His powers allow him to control technology and electricity.

- The episode title possibly references the movie “Contact” by Robert Zemeckis in which Ellie Arroway, a brilliant American scientist researching extra-terrestrial intelligence. One day she manages to detect a strange message of unknown origin coming from the star Vega. After decoding it, the message is revealed to be the blueprints of an interstellar transport vehicle…

- Mr Chardin makes an allusion to Charlie Chaplin while talking about Odd’s short film.
Charlie Chaplin, full name Sir Charles Spencer Chaplin Jr., was a famous burlesque British actor, director, producer and writer who achieved fame around the twentieth century for his mime games.