The radio works again, but they are only using a battery for the power that will go out in 3 hours. That's the time they have to repair the emergency power back-up. The controllers have to deal with a lot of incomming airplanes, but Shinoda is mostly worried about a fligth where her soon to be bf is flying with in the pilots cabin. However, with the help of everybody they also manage to land it safely and all can celebrate a nice Christmas with their loved ones.