David Duchovny rose to stardom as maverick FBI Special Agent Fox Mulder on the hit science-fiction series The X-Files. Created by Chris Carter, the show originally aired on Fox from 1993 to 2002, for nine seasons and a total of 202 episodes, plus two feature films. However, Duchovny's Mulder literally disappeared in Season 7, puzzling and disappointing fans. Charming and determined to uncover the truth, no matter the cost, Mulder was the heart of The X-Files, alongside his skeptical partner Dana Scully played by the inimitable Gillian Anderson.
Source：https://www.cbr.com/why-david-duchovny-left-x-files/
