X-Philes everywhere, rejoice! David Duchovny will reprise his role as FBI Agent Fox Mulder for The X-Files's two-hour series finale (May 19, 8-10 pm/ET). According to the show's official website, "The final episodes of the series will examine many of the pieces involved in the long-running mythology that has continued throughout the show's nine seasons." Duchovny is also slated to direct the April 28 installment, which is based on a story idea he co-wrote with X-Files creator Chris Carter and executive producer Frank Spotnitz.