You will Watch Code Lyoko Episode 4 online for free episodes with HQ / high quality. Stream cartoons Code Lyoko Episode 4 Log Book When Sissi finds and steals Ulrich’s diary, he is blackmailed into being her boyfriend. During a trip to a swimming pool, Jeremie and Yumi have the opportunity to find it. The new electric bus that is being used for the field trip is possessed by Xana, and starts acting weird as a result. Yumi ends up finding Sissi’s diary during this, and uses it to blackmail her into giving up the location of Ulrich’s. Xana then turns the bus on the city’s petrol-chemical plant, threatening to blow up a sizable portion of the city. Yumi is sent to Lyoko to help Aelita but she is devirtualized in the process and Odd managed to escape from the bus, leaving him to take Aelita safely to the tower to deactivate it thus ending the attack.