Code Lyoko - Season 4

Jeremy and Aelita must rebuild a new Lyoko to replace the one XANA maliciously destroyed at the end of the third season.

30 Episodes

William Returns

Season 4 - Episode 1

Using the data that Franz Hopper gave them, Jeremie and Aelita succeed in recreating Lyoko, which now holds only Sector Five. Soon after, Wi...

Double Take

Season 4 - Episode 2

In order to compensate for all of William, while under XANA's control, Jeremie sets to work designing new equipment for his friends and recr...

Opening Act

Season 4 - Episode 3

Jim's nephew, Chris, the drummer of the Subdigitals, pays a visit to Kadic to look for an opening act for the band's next concert. Everybody...

Wreck Room

Season 4 - Episode 4

There is a new recreation room at Kadic and William's clone is put in charge of it. Meanwhile, Jeremy has developed a program to get the rea...

Skidbladnir

Season 4 - Episode 5

The new virtual, submersible "submarine" (as Jeremy calls it) is almost complete, the last step being a secondary program that needs to be r...

Maiden Voyage

Season 4 - Episode 6

The gang manages to convince Jeremy to let them test out the Skid. During this test, the navigation system bugs up, leaving the gang strande...

Crash Course

Season 4 - Episode 7

Jeremy decides to teach Odd, Ulrich, and Yumi how to use the Supercomputer in case he or Aelita are unable to, being X.A.N.A.'s favorite tar...

Replika

Season 4 - Episode 8

The group travels to one of X.A.N.A.'s replica sectors in the Digital Sea. Meanwhile, Aelita and Odd get into a fight after Odd's desire to ...

I'd Rather Not Talk About It

Season 4 - Episode 9

The group turns to Jim for training, so they can be better prepared to fight against X.A.N.A.. However, things go bad when X.A.N.A. possesse...

Hot Shower

Season 4 - Episode 10

When a comet passes near Earth, X.A.N.A. uses a laser-equipped military satellite to split it into chunks, simultaneously aiming the bulk of...

The Lake

Season 4 - Episode 11

Jeremy, Aelita, Ulrich, and Odd go with the rest of their science class on a field trip to an island in the middle of a nearby lake to study...

Lost at Sea

Season 4 - Episode 12

Hiroki steals Yumi's diary and Ulrich finds it. Meanwhile, in a new attempt to free William from X.A.N.A.'s evil clutches, Jeremy creates a ...

Lab Rat

Season 4 - Episode 13

Jeremie has perfected his "Teleportation" process, allowing him to send his friends to the location of Xana's supercomputer in the real worl...

Bragging Rights

Season 4 - Episode 14

Having failed to destroy X.A.N.A.'s supercomputer in the Amazon, the group sets out to finish the job. Meanwhile, Odd's bragging gets the be...

Dog Day Afternoon

Season 4 - Episode 15

Odd tries to take Kiwi to Lyoko, but ends up absorbing him instead. As a result, Odd slowly begins to take on dog traits, such as enhanced s...

A Lack of Goodwill

Season 4 - Episode 16

Jeremy has developed a program to make the William clone smarter, but the learning curve is still problematic, as it tries to fling a glass ...

Distant Memory

Season 4 - Episode 17

It's holiday time at Kadic and everyone is headed home. Aelita, however, has no home to go to. As she watches over Lyoko, she gets a message...

Hard Luck

Season 4 - Episode 18

When Odd breaks a mirror, a little bad luck follows and jinxes him everywhere, even on Lyoko. A bug in his virtual avatar spreads to Yumi an...

Guided Missile

Season 4 - Episode 19

Jeremy wins a contest to take a flight in an armed fighter jet, even though it is Odd who entered him into the contest. However, just before...

Kadic Bombshell

Season 4 - Episode 20

When Sissi's pen pal from Iceland, Brynja Heringsdötir, arrives at the school, all the boys swoon over her, making Sissi envious. When Brynj...

Canine Conundrum

Season 4 - Episode 21

When Kiwi's mindless destruction becomes too much for the group to bear, they force Odd to keep him at the factory. As Odd drops him off, XA...

A Space Oddity

Season 4 - Episode 22

Because of a surprise dorm inspection, Odd has to convince Yumi to keep Kiwi at her house. Jeremie, meanwhile, has located the next Replika,...

Cousins Once Removed

Season 4 - Episode 23

Jeremie's cousin, Patrick, comes to visit. Jeremie isn't entirely happy about it, since Patrick is "super cool" compared to him. Discovering...

Music to Soothe The Savage Beast

Season 4 - Episode 24

Aelita's first concert with the Subdigitals is coming up, but Aelita's stage fright threatens to get the better of her. Odd meanwhile, has t...

Wrong Exposure

Season 4 - Episode 25

Aelita finds a photo of herself with Franz Hopper at the Hermitage, with a mathematical equation in the background. Jeremie discovers that t...

Bad Connection

Season 4 - Episode 26

Odd is presenting one of his films, but is unhappy because his parents are coming. According to him, they never find fault in anything he do...

Cold Sweat

Season 4 - Episode 27

When an embarrassing picture of Yumi is printed in the Kadic newspaper, she turns to Odd as the source. He manages to get Ulrich to take the...

Down to Earth

Season 4 - Episode 28

In order to defeat XANA, whom they have vastly underestimated, Jeremie plans to design another multi-agent system to combat him. That, howev...

Fight to the Finish

Season 4 - Episode 29

With the Skid gone and XANA's Replikas at unmanageable numbers, Jeremie continues work on his multi-agent system. Meanwhile, Aelita has nigh...

Echoes

Season 4 - Episode 30

With their mission completed, the group looks back on all their fond memories of Lyoko. Sissi, meanwhile, plants a tracking device on Ulrich...