Code Lyoko Season 1 Episode 1

International air dates:
France: September 3, 2003
Canada: September 11, 2004 on YTV

Throughout much of the earlier episodes of the first season, Christine Flowers would provide the voice for "Sissi Delmas." Jodi Forrest would take over later in the season and voice the character for the rest of the series. Christophe Caballero would serve as the voice of "Odd Della Robbia" for the first and fourth episode of the series before being replaced by Matthew Géczy.

The title of this episode is exactly the same in both the French and English translation.

The Roachesters and Megatank are the first monsters to appear onscreen in the series.

Falling into the digital sea can be deadly.

The Return to the Past trip can´t bring dead people back to life.

This is the first episode where Yumi is wearing different clothes.

The Desert Region is introduced in this episode.

This marks the first time on screen that Odd uses his special Lyoko power of clairvoyance. In a vision, he sees Aelita falling into the digital sea.

The sign on the infirmary shows a red cross, and then 8:30-17:40. These are probably the hours of the infirmary. Also, 17:40 is 5:40 p.m.

Though Yumi and Ulrich were probably virtualized and had adventures in Lyoko in the past off screen, Odd is the first one to be shown virtualized on screen in the series.

One of the cars damaged by the teddy bear is clearly identifiable as a Mercedes-Benz A-Class, both by its distinctive shape (the car was not crushed) and by the Mercedes symbol on each of the visible hubcaps.

The series, Code Lyoko has been mistaken by some for being Japanese anime. In reality, CL is a cartoon that originates in France. The mistake is understandable because the animation of the series is inspired by anime.

Some viewers were worried that the first episode has two different scenes involving Yumi and Sissi that they deem inappropriate and explicit for younger viewers, but in actuality there are none. The girls aren't nude in these scenes. Sissi is in her underwear (Not more revealng than a bikini) and you can only see 1/16 of the side of Yumi's naked body for a second, then she covers it with her towel.

This is one of two episodes in the first season where Odd uses both arrow guns against his enemies. The other is "Amnesia."

Odd has a picture of his dog on his virtual costume.

In Japanese, Yumi's name means "bow" as in archery.

It is first hinted in this episode through their intense blushing and the way they look at each other in certain situations that Ulrich and Yumi share hidden romantic feelings that they are not willing to admit yet.

We find out that Odd turns into a cat-type creature in Lyoko, and that his weapon of choice is the Laser Arrow, which are fired from his wrist. Jeremy sits in a large chair with the supercomputer and advises the people in Lyoko.

The kids are are in a collége, which is France's equivalent to Junior High School in the U.S. (the term Junior High is used in this episode). Odd and Ulrich share a dorm together. Jeremie lives in a dorm by himself and Yumi lives off campus with her parents.