Mitch Pileggi is set to reprise his role as FBI Assistant Director Walter Skinner in Fox’s upcoming revival of The X-Files, EW has confirmed. David Duchovny hinted at Pileggi’s return last month when he appeared on Late Show with David Letterman. Skinner became a fan favorite over the series’ nine-season run, moving from uptight boss to one of Mulder and Scully’s main allies, and was last seen in a brief appearance in 2008’s feature film I Want to Believe.