High Quality Content by WIKIPEDIA articles! "Patient X" is the thirteenth episode of the fifth season of American science fiction television series The X-Files, and the 110th episode of the series overall. It was written by series creator Chris Carter and Frank Spotnitz, directed by Kim Manners and aired in the United States on March 1, 1998 on the Fox network. The show centers on FBI Special Agents Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) who work on cases linked to the paranormal, called X-Files.