While in Europe, Sarah and Chuck realize theyÔÇÖre traveling on a train with Spanish spies. Even though theyÔÇÖre all alone, they decide to take on these rogue agents. Of course, this impromptu mission doesnÔÇÖt go smoothly. Meanwhile, Beckman orders her newest ÔÇ£unlikelyÔÇØ spy team ÔÇô John Casey and Morgan Grimes ÔÇô to track down the missing couple.
