The Enfield Haunting (2015)

S3E7 The Secret

After Yumi turns him down, William becomes determined to uncover her hidden secret. He successfully tracks Ulrich and Odd to the factory, where he discovers the existence of Lyoko and Xana. Meanwhile, in the Ice Sector, the Scyphozoa takes control of Aelita to input Code: Xana into the way tower, but she is devirtualized just in time. The team believes William's assistance could be beneficial when a possessed demolition worker plants bombs inside the factory. They hold a vote on whether to include William in their group, but with Yumi opposing, Jeremie decides to initiate a return to the past.