The X-Files is an American science fiction drama television series, which is a part of The X-Files franchise, created by Chris Carter. The program originally aired from September 10, 1993 to May 19, 2002, spanning nine seasons and 202 episodes. In the series, FBI special agents Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson) are the investigators of X-Files: marginalized, unsolved cases involving paranormal phenomena. Mulder is a believer in the existence of aliens and the paranormal while Scully, a skeptic, is assigned to make scientific analyses of Mulder's discoveries which could ultimately be used to debunk Mulder's work and thus return him to FBI mainstream. Early in the series both agents become pawns in a larger conflict, and come to trust only each other. They develop a close relationship, which begins as a platonic friendship, but develops into a romantic relationship by the end of the series' run.