List of episodes of Code Lyoko. For the sequel series, see Code Lyoko: Evolution.
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Season 1 (2003-2004)
- TeddyGozilla
- Seeing Is Believing
- Holiday in the Fog
- Log Book
- Big Bug
- Cruel Dilemma
- Image Problem
- End of Take
- Satellite
- The Girl of his Dreams
- Plagued
- Swarming Attack
- Just in Time
- The Trap
- Laughing Fit
- Claustrophobia
- Amnesia
- Killer Music
- Frontier
- The Robots
- Zero Gravity Zone
- Routine
- Rock Bottom
- Ghost Channel
- Code: Earth
- False Start
Season 2 (2005-2006)
- New Order
- Uncharted Territory
- Exploration
- A Great Day
- Mister Puck
- Saint Valentine's Day
- Final Mix
- Missing Link
- The Chips Are Down
- Marabounta
- Common Interest
- Temptation
- A Bad Turn
- Attack of the Zombies
- Ultimatum
- A Fine Mess
- XANA's Kiss
- Vertigo
- Cold War
- Déjà Vu
- Tip-Top Shape
- Is Anybody Out There?
- Franz Hopper
- Contact
- Revelation
- The Key
Season 3 (2006)
XANA Awakens (2006)
Season 4 (2007)
- William Returns
- Double Take
- Opening Act
- Wreck Room
- Skidbladnir
- Maiden Voyage
- Crash Course
- Replika
- I'd Rather Not Talk About It
- Hot Shower
- The Lake
- Lost at Sea
- Lab Rat
- Bragging Rights
- Dog Day Afternoon
- A Lack of Good Will
- Distant Memory
- Hard Luck
- Guided Missile
- Kadic Bombshell
- Canine Conundrum
- A Space Oddity
- Cousins Once Removed
- Music to Soothe the Savage Beast
- Wrong Exposure
- Bad Connection
- Cold Sweat
- Down to Earth
- Fight to the Finish
- Echoes