List of episodes of Code Lyoko. For the sequel series, see Code Lyoko: Evolution.
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Season 1 (2003-04)
- Unaired Pilot: "Garage Kids"
(2001)
- "Teddygozilla"
(September 3, 2003 (France); April 19, 2004 (U.S.)) - "Seeing Is Believing"
(September 10, 2003 (France); April 20, 2004 (U.S.)) - "Holiday in the Fog"
(September 17, 2003 (France); April 21, 2004 (U.S.)) - "Log Book"
(September 24, 2003 (France); April 22, 2004 (U.S.)) - "Big Bug"
(October 1, 2003 (France); April 23, 2004 (U.S.)) - "Cruel Dilemma"
(October 8, 2003 (France); April 26, 2004 (U.S.)) - "Image Problem"
(October 15, 2003 (France); April 27, 2004 (U.S.)) - "End of Take"
(October 22, 2003 (France); April 28, 2004 (U.S.)) - "Satellite"
(October 29, 2003 (France); April 29, 2004 (U.S.)) - "The Girl of the Dreams"
(November 5, 2003 (France); April 30, 2004 (U.S.)) - "Plagued"
(November 12, 2003 (France); May 3, 2004 (U.S.)) - "Swarming Attack"
(November 19, 2003 (France); May 4, 2004 (U.S.)) - "Just in Time"
(November 26, 2003 (France); May 5, 2004 (U.S.)) - "The Trap"
(December 3, 2003 (France); May 6, 2004 (U.S.)) - "Laughing Fit"
(December 10, 2003 (France); May 7, 2004 (U.S.)) - "Claustrophobia"
(December 17, 2003 (France); May 10, 2004 (U.S.)) - "Amnesia"
(December 24, 2003 (France); May 11, 2004 (U.S.)) - "Killer Music"
(December 31, 2003 (France); May 12, 2004 (U.S.)) - "Frontier"
(January 7, 2004 (France); May 13, 2004 (U.S.)) - "The Robots"
(January 14, 2004 (France); May 14, 2004 (U.S.)) - "Zero Gravity Zone"
(January 21, 2004 (France); May 17, 2004 (U.S.)) - "Routine"
(January 28, 2004 (France); May 18, 2004 (U.S.)) - "Rock Bottom?"
(February 4, 2004 (France); May 19, 2004 (U.S.)) - "Ghost Channel"
(February 11, 2004 (France); May 20, 2004 (U.S.)) - "Code: Earth"
(February 18, 2004 (France); May 21, 2004 (U.S.)) - "False Start"
(February 25, 2004 (France); May 24, 2004 (U.S.))
Season 2 (2005-06)
- "New Order"
(August 31, 2005 (France); September 19, 2005 (U.S.)) - "Uncharted Territory"
(September 7, 2005 (France); September 20, 2005 (U.S.)) - "Exploration"
(September 14, 2005 (France); September 21, 2005 (U.S.)) - "A Great Day"
(September 21, 2005 (France); September 22, 2005 (U.S.)) - "Mister Pück"
(September 28, 2005 (France); September 23, 2005 (U.S.)) - "Saint Valentine's Day"
(October 5, 2005 (France); September 26, 2005 (U.S.)) - "Final Mix"
(October 12, 2005 (France); September 27, 2005 (U.S.)) - "Missing Link"
(October 19, 2005 (France); September 28, 2005 (U.S.)) - "The Chips Are Down"
(October 26, 2005 (France); September 29, 2005 (U.S.)) - "Marabounta"
(November 2, 2005 (France); September 30, 2005 (U.S.)) - "Common Interest"
(November 9, 2005 (France); October 3, 2005 (U.S.)) - "Temptation"
(December 7, 2005 (France); November 25, 2005 (U.S.)) - "A Bad Turn"
(November 16, 2005 (France); October 26, 2005 (U.S.)) - "Attack of the Zombies"
(November 23, 2005 (France); October 4, 2005 (U.S.)) - "Ultimatum"
(November 30, 2005 (France); October 5, 2005 (U.S.)) - "A Fine Mess"
(December 14, 2005 (France); October 6, 2005 (U.S.)) - "XANA's Kiss"
(January 11, 2006 (France); October 7, 2005 (U.S.)) - "Vertigo"
(January 11, 2006 (France); October 24, 2005 (U.S.)) - "Cold War"
(January 18, 2006 (France); October 25, 2005 (U.S.)) - "Déjà Vu"
(January 18, 2006 (France); October 27, 2005 (U.S.)) - "Tip-Top Shape"
(January 25, 2006 (France); October 28, 2005 (U.S.)) - "Is Anybody Out There?"
(January 25, 2006 (France); November 1, 2006 (U.S.)) - "Franz Hopper"
(February 1, 2006 (France); October 31, 2005 (U.S.)) - "Contact"
(February 1, 2006 (France); November 25, 2005 (U.S.)) - "Revelation"
(February 8, 2006 (France); December 9, 2005 (U.S.)) - "The Key"
(February 8, 2006 (France); December 9, 2005 (U.S.))
Prequel (2006)
- "XANA Awakens, Part 1"
(October 21, 2006 (France); October 2, 2006 (U.S.)) - "XANA Awakens, Part 2"
(October 21, 2006 (France); October 3, 2006 (U.S.))
Season 3 (2006)
- "Straight to Heart"
(October 4, 2006 (France); September 9, 2006 (U.S.)) - "Lyoko Minus One"
(October 5, 2006 (France); September 16, 2006 (U.S.)) - "Tidal Wave"
(October 6, 2006 (France); September 23, 2006 (U.S.)) - "False Lead"
(October 10, 2006 (France); September 30, 2006 (U.S.)) - "Aelita"
(October 11, 2006 (France); October 7, 2006 (U.S.)) - "The Pretender"
(October 12, 2006 (France); October 14, 2006 (U.S.)) - "The Secret"
(October 13, 2006 (France); October 21, 2006 (U.S.)) - "Temporary Insanity"
(October 16, 2006 (France); November 1, 2006 (U.S.)) - "Sabotage"
(October 17, 2006 (France); November 2, 2006 (U.S.)) - "Nobody in Particular"
(October 18, 2006 (France); November 3, 2006 (U.S.)) - "Triple Trouble"
(October 19, 2006 (France); November 6, 2006 (U.S.)) - "Double Trouble"
(October 20, 2006 (France); November 7, 2006 (U.S.)) - "Final Round"
(October 23, 2006 (France); November 8, 2006 (U.S.))
Season 4 (2007)
- "William Returns"
(May 18, 2007 (France); August 13, 2007 (U.S.)) - "Double Take"
(June 12, 2007 (France); August 14, 2007 (U.S.)) - "Opening Act"
(June 19, 2007 (France); August 30, 2007 (U.S.)) - "Wreck Room"
(June 26, 2007 (France); August 15, 2007 (U.S.)) - "Skidbladnir"
(July 3, 2007 (France); August 16, 2007 (U.S.)) - "Maiden Voyage"
(July 10, 2007 (France); August 17, 2007 (U.S.)) - "Crash Course"
(July 17, 2007 (France); August 20, 2007 (U.S.)) - "Replika"
(July 24, 2007 (France); August 21, 2007 (U.S.)) - "I'd Rather Not Talk About It"
(July 31, 2007 (France); August 22, 2007 (U.S.)) - "Hot Shower"
(August 14, 2007 (France); August 23, 2007 (U.S.)) - "The Lake"
(August 21, 2007 (France); August 24, 2007 (U.S.)) - "Lost at Sea"
(August 28, 2007 (France); August 27, 2007 (U.S.)) - "Lab Rat"
(August 28, 2007 (U.S.; was skipped in France and added online instead)) - "Bragging Rights"
(September 8, 2007 (France); August 29, 2007 (U.S.)) - "Dog Day Afternoon"
(September 15, 2007 (France); August 29, 2007 (U.S.)) - "A Lack of Goodwill"
(September 22, 2007 (France); August 30, 2007 (U.S.)) - "Distant Memory"
(September 29, 2007 (France); August 31, 2007 (U.S.)) - "Hard Luck"
(October 6, 2007 (France); September 8, 2007 (U.S.)) - "Guided Missile"
(October 13, 2007 (France); September 15, 2007 (U.S.)) - "Kadic Bombshell"
(November 3, 2007 (France); September 22, 2007 (U.S.)) - "Canine Conundrum"
(November 10, 2007 (France); September 29, 2007 (U.S.)) - "A Space Oddity"
(November 17, 2007 (France); October 6, 2007 (U.S.)) - "Cousins Once Removed"
(November 17, 2007 (France); October 13, 2007 (U.S.)) - "Music to Soothe the Savage Beast"
(2007 (France; online); October 20, 2007 (U.S.)) - "Wrong Exposure"
(2007 (France; online); October 27, 2007 (U.S.)) - "Bad Connection"
(2007 (France; online); November 3, 2007 (U.S.)) - "Cold Sweat"
(2007 (France; online); November 3, 2007 (U.S.)) - "Down to Earth"
(2007 (France; online); November 3, 2007 (U.S.)) - "Fight to the Finish"
(2007 (France; online); November 10, 2007 (U.S.)) - "Echoes"
(2007 (France; online); November 10, 2007 (U.S.))