“The X-Files” star David Duchovny has officially closed the file on his luxurious Malibu retreat. Tucked behind a private gate, the meticulously designed property sold for the hefty price tag of $10,979,100. The three-bedroom main residence features an eye-catching restored train caboose-turned guest retreat on the sprawling property. The Malibu mansion property is 3,577 square-feet, not including the train car or flex structure. Duchovny is known for playing the curious FBI agent Fox Mulder in the ”X-Files”.