Ultimatum

S2, E15: XANA has possessed the Headmaster. Mr. Delmas kidnaps Yumi and Odd and gives Jeremy an ultimatum -- Aelita must go to the edge of the Ice Sector on Lyoko within two hours, or Odd and Yumi go bye-bye! Our heroes don't have a moment to lose! But the police is also looking for Odd and Yumi and they get in our heroes way. Luckily, thanks to a electro-magnetic bomb made by Jeremy, Ulrich eliminates the xanafied Headmaster and saves Odd and Yumi at the last second...back on Lyoko, Aelita deactivates the tower.