About the characters

- First allusion (aside from family name) to Yumi’s Japanese origins with the armour belonging to her ancestors.
- Second episode in season 1 in which Sissi is absent.
- Milly and Tamiya are in class 6B.
- Bloks are Odd’s favourite monster.
- According to Odd, Jeremy has never been able to talk to girls.
- The principal says that Jim is a man loved by all students.

About errors

- The factory computer microphone constantly changes (wired or wireless), and in one shot when Jeremy’s trying to figure out how to destroy the Guardian the piece he speaks into is missing.
- When Odd watches the two Bloks, the Way Tower’s halo disappears.
- When Odd and Ulrich leave the lift, the buttons are in the wrong place.
- Just before Odd enters the scanner, the colours of his pants are inversed, as well as when Yumi says “Thanks for caring, guys…”. They become entirely the one shade of purple when she asks Jeremy to hurry.
- When Taelia and Jeremy are at the factory the access to the lift is orange.
- When Yumi does her report it’s not her class that we see but students in years 7 and 8.
- The buttons on Jeremy’s computer mouse are absent when he tries to localise Aelita.
- The platform of the Way Tower lit up when Aelita, Odd and Ulrich landed on it, but was then dark again.
- The door of Jeremy’s room is dark green instead of grey and it opens from left to right instead of the other way around.
- When Tamiya drops the camera and films Milly’s feet, we see a wired microphone even though she isn’t using one.
- On Jeremy’s screen, we can see the yellow icon belonging to Aelita before she was freed from the Guardian, which is impossible.
- At the moment when the principal enters the classroom, Tania Granjean is behind Odd when she was meant to be sitting behind Jeremy and Ulrich.
- Just before Ulrich asks Jeremy to stop, the microphone is in his right ear instead of his left.
- Just before Taelia turns to see the samurai armour we see her in the dorms when she’s not actually there at the time.
- At the start of Ms Meyer’s class, when she begins to write an equation on the board, it’s not her hand we see but Ms Hertz’!
- The principal’s moustache and eyebrows are grey in two shots, when he announces to the students that the armour is nowhere to be found, and those that know anything should go to the police.
- The door to the boiler room is grey when Taelia and Jeremy go through it and at the moment when the armour enters, the door changes. When Yumi runs to get out of the gym there’s a grey poster on the door which appears on one of the two doors she uses to enter.
- Milly says that she and Tamiya are in year 7, which would place them as being one year behind Jeremy, Ulrich and Odd. They are actually in year 6, two years behind the aforementioned boys.

- During Ms Hertz’ class just behind Ulrich we can see Tristan Brossard (even though he’s in year 7) and behind him, his clone wearing a different-coloured jumper.
See for yourself!

If you look hard at the back row, there’s a definite resemblance between the double and Trasian!

About the series

- French title: Créature de rêve

- Only appearance of Talia, a young girl who resembles Aelita to a tee. At first (in the French version), the girl’s name was going to be Taelia, an anagram of Aelita, but the name was changed to keep the pronunciation correct! In the American English version, the name was kept in its original form (Taelia).
- Final appearance of the Guardian.
- First appearance of the Ishiyama’s samurai armour which is seen again in episode 39, “A Bad Turn”.
- First time we see Jeremy input the code in the lift to access the lab in the factory. Said code is 5793.
- Third time Odd has a Future Flash.
- Ulrich : "A Guardian, the same monster that imprisoned Yumi."
Ulrich alludes to episode 7, “Image Problem” where XANA kept Yumi on Lyoko to send an evil clone of her to Earth to destroy the scanners.

About references

- The armour Yumi presents in her report is samurai armour.
Samurai were a type of warrior during the feudal period in Japan.