 After series creator Chris Carter and Howard Gordon completed the script for "Unrequited", the former assigned the latter to develop a new episode with David Greenwalt, who was new to the show and had been hired a few months prior as a producer.Gordon and Greenwalt met up and began writing what would become "Synchrony".During this process, they struggled to find a good plot, and they almost submitted a story involving an inmate swapping bodies with another man to escape prison.