When asked about his willingness to do a third X-Files film during an interview with Jay Leno, actor David Duchovny insisted that he would “play Fox Mulder forever”. But, considering the last X-Files film, I Want to Believe, was a box-office disappointment, it’s going to take a little extra effort to get Mulder and Scully back on the big screen. Duchovny encouraged fans to start a letter-campaign to the film studio, telling them they actually want a third installment of the series …