Bad Connection (S04E26)
Odd is set to showcase one of his films but is feeling uneasy about his parents attending. He feels they never criticize him, which leaves him feeling like he’s not living a typical teenage experience. When he finally gives in to the pressure, XANA launches an attack, using the school's cell phone antenna to unleash a virus that turns those who answer their phones into aggressive, mind-controlled beings, starting with Odd's parents. Nearly everyone is affected, except for the Lyoko warriors and Sissi, whose phone was accidentally damaged by her father. As Odd and Sissi dodge the crazed students and staff, the others work to deactivate the tower in the Mountain Sector. After a return trip erases everyone's memories, Odd plays his film, highlighting the funny moments at Kadic, with Sissi portrayed positively for her earlier help, leaving her bewildered.