In order to compensate for all of William, while under XANA's control, Jeremie sets to work designing new equipment for his friends and recreating Lyoko. In order to buy himself time to do this, he activates a tower and uses it to create a a clone of his own to attend class in his place. Meanwhile, William's absence is drawing attention, from both the principal and his father. While Jeremie's Clone is impressing Jim outside, William appears on Lyoko and tries to put the tower under XANA's control. In order to maintain his clone, Jeremie draws energy from Sector Five to maintain the activated tower. He eventually runs out of energy and the tower is put under XANA's control. While Odd holds the Jeremie Clone off, Aelita, Yumi, and Ulrich go to Lyoko with new outfits and powers. They eventually deactivate the tower and stop William, who tries to push Yumi into the digital sea. She is saved by Odd at the last second. Jeremie then does a return to the past and replaces the Jeremie Clone with a William Clone to prevent any suspicion about his absence.
A transplanted author suffers from writer's block and is disappointed that his novel has been turned into a romantic comedy for the big screen. He also learns his ex is engaged and that their 12-year-old daughter is acting on her “emerging sexuality.”
Using the data that Franz Hopper gave them, Jeremie and Aelita succeed in recreating Lyoko, which now holds only Sector Five. Soon after, William is devirtualized, and seems perfectly normal. Sissi decides to make herself "editor-in-chief" of Kadic News, much to Milly and Tamiya's dismay. She soon barges into Aelita's room to interview her and is stopped by William. As soon as William makes Sissi, timay and milly leave,William kidnaps Aelita and takes her to Lyoko. William leads Aelita out of Sector Five and to what used to be The Desert Sector. His intent is revealed to throw Aelita into the Digital Sea. Odd manages to stop him, but William dives into the digital sea. Jeremie concludes that this is Xana's new strategy, and that they must be careful.
Lauren returns to Laguna Beach for some advice. Meanwhile, Audrina and her new beau get serious with their relationship and Spencer proposes to Heidi.
The third season premieres with Lauren and Heidi still unable to get past their differences and having become mortal enemies. Meanwhile, Whitney has graduated from college and is now juggling a real job and Audrina has become Lauren's new roommate and best friend.
Kyle, Declan and Foss plot to retrieve Kyle's Latnok ring. Meanwhile, Lori begins to question Stephen's time at Madacorp.
The two Hell's Kitchen finalists take opposite approaches in dealing with their staff. Chef Ramsay reviews the proposed dishes and presents the finalists with their own head chef’s jackets in preparation for the final dinner service. At the end of the night, one finalist emerges the winner.
In an effort to get good PR for the department, Deputy Chief Johnson takes a journalist on a ride-along, but when the Crown Vic is targeted and shot at, Brenda is forced to live under 24-hour police protection, while being the key witness in the case she must solve.
A 17-year-old devout Christian comes under attack just days before he’s scheduled to testify in a murder trial. In order to ensure his safety, Grace allows him to move in with her. But Grace can only handle so much preaching, so she ropes the guys into helping her watch over him. Grace gets pissed when Earl uses Leon Cooley and her nephew, Clay, to get her attention.
After being threatened by U-Turn and The Armenians, Nancy goes in search of Silas and her hijacked pot. Meanwhile, Celia has Silas arrested for stealing her "Drug Free Zone" signs. Nancy visits him in jail only to discover that the pot is still in his car - the one that Celia has just driven away in.
Bill takes Margene to a convention. Frank is looking for a new wife. Meanwhile, Nicki throws a party.
Richard surprises Isabelle when he shows up in Promise City but the happy reunion takes a turn when Richard kidnaps her in hopes to start a new life with his daughter.
In the first-season finale, Butchie and Kai have a joyous revelation; and Imperial Beach plays host to a makeshift parade.
Using the band's "emergency fund," Murray organizes a warm-up tour in preparation for a big gig in Central Park. At an airport bar, the boys get hooked by some "mermaids" from a woman's water-polo team - nearly ruining the tour and their relationship with Murray.
Eric gets into a fender-bender with Anna Faris, leading to what he believes to be "a little moment," but in the end, his career is about to change. Ari's wife acts on a soap opera, leading him to try and dissuade her from doing so. Turtle gets prepped for a party by picking up some provisions, and girls, only to encounter the law on the way home.
London (even though she can't sing or dance) gets the role of Sharpay in their school production of High School Musical instead of Maddie because Mr. Tipton is financing the director's play "Floss" on Broadway. Zack has to work backstage for detention and Cody gets the part of Troy.
After both Ron Stoppable and shallow Camille Léon leave their beloved pets behind during a fight, Rufus and Debutante go on an adventure, playing a little game of cat and mouse, traversing continents, and finding new friends, all to find their respective owners.
When the mysterious and creepy Nanny Maim begins reverting people into super babies and using them in a world-wide robbing spree, Kim must use her natural baby-sitting skills to save the day.