Code Lyoko
Season 2 Episode 8 - Missing Link
During a mission to The Carthage Region, the Scyphozoa attacks Yumi, stealing her human DNA, having her trapped on Lyoko. To make matters worse, it's picture day for her class and she will be suspended if absent. After some discussion, Ulrich gets the idea to have Sissi stand in for Yumi. Strangely, Sissi agrees and asks for nothing in return. During this, Jeremie tries to come up with a way to bring Yumi back. Aelita thinks of a way, but won't tell Jeremie about it. She only tells him once she gets to Lyoko, so he can't object. She begins to transfer her own genetic code to Yumi, which will let Xana take her memory at will, being exposed. Luckily, Odd and Ulrich get there in time to stop her. Meanwhile, Jermie figures out that Yumi's DNA should be stored in XANA's memory, which is accessible through Sector Five.
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