About the characters

- First time a Megatank falls into the Digital Sea.
- Second episode in which Sissi cries.
- Herb is jealous of Ulrich.
- Yumi knows how to force locks.
- Odd thinks that Sissi should get a nose job.
- Ulrich keeps a diary in which he writes about things such as Lyoko and his love for Yumi.
- Sissi is insanely jealous of Yumi, doesn’t like Jim, is ready to do anything to go out with Ulrich, even blackmail…despite everything she apologises, proof of a good heart; she also keeps a diary.

About errors

- The bus door is sometimes blue instead of white.
- When Yumi arrives on Lyoko the tower’s halo disappears.
- When Sissi talks about going to the cinema with Ulrich, Pierre François is no longer behind them but Heidi is.
- When Yumi grabs her skateboard to get to the factory, we see Jeremy’s scooter when it should already be at the other end of the tunnel.
- When the bus reaches the petrochemical plant there are only three police cars when there used to be four.
- Just at the moment when the bus driver asks what’s happening, Herb isn’t beside Ulrich, but Jean-Baptitse Pujol.
- Jim is shown sitting at the very back of the bus, but when it speeds up he is sitting in one of the two-seaters beside the aisle. He then appears back in the back seat.
- When Odd jumps out of the bus the door is facing the traffic islands in the middle of the road, meaning the bus is driving on the wrong side of the road. He is then seen getting up off a footpath, so unless he rolled in a large arc back onto the closer footpath, they made a mistake in the background art. Similarly, the number of lanes on the road is meant to be two, but the placement of the bus makes it appear around five or so.
- During Mr Fumet’s class we can see Sandra Dialo and Ninon Costes when they’re actually in year 6, as well as Pierre François and Tristan Brossard who are in year 7.
- At the moment when Jeremy says “Careful, there’s a ridge,” we see that Odd and Aelita’s icons are on the other side of the plateau instead of behind the Megatank.
- Just before Odd catches Aelita to stop her from falling into the Digital Sea, we see an identical shot to one from the first episode, “Teddygozilla” where he runs to meet Aelita at the crater.
- The factory computer microphone changes often (wired or wireless). And it disappears from Jeremy’s eat when Ulrich tells him where he is, when Jeremy isn’t sure where XANA’s taking the bus, and when he says “Crazy.”
- We notice that two students held prisoner on the crazy bus (Claire Girard and Jean-Baptiste Pujol) walk past in a later shot at Kadic when Yumi receives a call from Jeremy. Pierre François is also seen both on the bus and in Yumi’s class…unless you have the power of ubiquity, that’s impossible.
- Odd’s pants are entirely the one shade of purple when Yumi walks towards him and Jeremy, when he signals to Ulrich to sit next to him, just before jumping off the bus, and before leaving the lift, and the colours are inversed just as he enters the scanner.
- On the bus, just after Ulrich had spoken into Odd’s ear, Sandra Dialo is just behind Emilie when she was in front of her on the bus.
- Odd’s phone number and Yumi’s are identical: 655-225-958!

About the series

- French title: Carnet de bord

- First mention of the Digital Sea.
- First flashback in the series (Sissi looking for Ulrich’s diary) when Yumi reads her diary.
- Only episode in which there is a sandstorm in the Desert Sector.
- Second of two episodes in which Odd was voiced by Christophe Caballero.
- Second of three episodes in which Sissi was voiced by Christine Flowers.

About references

When Ulrich opens the drawer of his closet we see a Game & Watch Mini Classic, this keychain is one of the last official renditions of the Game & Watch games released in 1998.