The Enfield Haunting (2015)

S3E10 Nobody in Particular

In an experiment aimed at bringing Ulrich into Sector 5, a mishap causes his mind and body to split apart. As a result, Ulrich's physical form is stranded on Lyoko while his consciousness remains on Earth. The situation worsens when Xana takes control of Ulrich’s body, using it to launch an assault on the core. Meanwhile, Susan, frustrated by Ulrich's poor academic performance, considers enrolling him in remedial classes to help improve his grades.