Code Lyoko: Season 4

Season 4 overview

The team restores Lyoko and brings William back to the real world, only to discover that he remains controlled by XANA. New equipment and the Skidbladnir are developed in response.

Key story beats

  1. William Returns — Jeremie and Aelita recreate Lyoko, William is materialized, and William secretly kidnaps Aelita while still under XANA's control.
  2. Clone Substitution — Jeremie creates a clone to attend class while he works on new equipment and the restoration of Lyoko.
  3. Aelita Auditions — Aelita is selected as an opening-act candidate, but a XANA clone kidnaps her and sends her to Lyoko.
  4. Clone Breakdown — Jeremie's attempt to free William causes a tower malfunction, allowing XANA to control it until Jeremie repairs the system.
  5. Skidbladnir Completed — The group completes the submarine-like Skidbladnir while William attacks and Yumi temporarily operates the Supercomputer.
  6. Digital Sea Trial — The Skidbladnir becomes stranded because of a navigation failure, and the group encounters another Lyoko and eel-like monsters.
  7. Emergency Training — Jeremie trains Odd, Ulrich, and Yumi to operate the Supercomputer after a polymorphic clone attacks him.
  8. First Replika Mission — The group explores a Forest Replika while William and Megatanks attack the Skidbladnir.
  9. Jim's Training — The group trains with Jim while XANA possesses a boar and sends William and Mantas against Lyoko's core.
  10. Satellite Strike — XANA redirects a laser-equipped satellite and a comet toward the factory, while Yumi helps evacuate the school and Jeremie hacks the satellite.
  11. Lake Attack — XANA attacks a school field trip with electrical sludge, forcing Yumi to go to Lyoko alone and fight William.
  12. Yumi Lost at Sea — A bugged sonar strands Yumi in the Digital Sea, and Jeremie guides the others toward her after detecting XANA's attempt to exploit the situation.
  13. Amazon Supercomputer — Jeremie teleports Aelita and Odd to XANA's real-world supercomputer, where they discover cybernetic spiders being built by possessed scientists.
  14. Amazon Counterattack — The group returns to finish destroying XANA's Amazon supercomputer, while Odd defeats William and helps destroy it.
  15. Odd and Kiwi Merge — Odd accidentally absorbs Kiwi during an attempted virtualization, develops dog traits, and must be separated while XANA attacks Yumi.

Seasons

Interactive Features

Episode Guide

Content sources

Plot analysis generated from content on Wikipedia, licensed under CC BY-SA 4.0.

Related entry on Wikidata (Q637190), public domain (CC0).