Code Lyoko
Season 2 Episode 4 - A Great Day
After taking another trip to The Carthage Region and returning to the school, Aelita talks to Jeremie about not being human, unaware that Sissi is recording their conversation. On top of that, the data they had retrieved from the Carthage Region takes over the supercomputer and starts running return trips over and over. Jeremie discovers that returning to the past makes X.A.N.A. much stronger and more powerful. During the third return trip, Xana possesses Sissi with his newly strengthened and increased abilities and powers and goes after Ulrich. Not only does the group have to deal with Sissi, but they also have to stop the return trips from continuing.
Episodes in Season 2
New Order
23 min
Uncharted Territory
23 min
Exploration
23 min
A Great Day
23 min
Mister Puck
23 min
Saint Valentine's Day
23 min
Final Mix
23 min
Missing Link
23 min
The Chips are Down
23 min
Marabounta
23 min
Common Interest
23 min
Temptation
23 min
A Bad Turn
23 min
Attack of the Zombies
23 min
Ultimatum
23 min
A Fine Mess
23 min
XANA's Kiss
23 min
Vertigo
23 min
Cold War
23 min
Déjà Vu
23 min
Tip-Top Shape
23 min
Is Anybody Out There?
23 min
Franz Hopper
23 min
Contact
23 min
Revelation
23 min
The Key
23 min