David Duchovny reveals 'failure of friendship' with The X-Files co-star Gillian Anderson amid tension on hit show

David Duchovny said that the bonds between he and Gillian Anderson, his co-star on The X-Files, were weakened during their time on the hit Fox series. Duchovny, who played the role of Fox Mulder on the sci-fi series opposite Anderson's Dana Scully, said there was a 'failure of friendship' between them during the show's first run from 1993 to 2002, which spanned nine seasons. David Duchovny, 64, said that the bonds between he and Gillian Anderson, his co-star on The X-Files, were weakened during their time on the hit Fox series. Anderson, a two-time Emmy winner, pictured at the Emmys in LA in September Duchovny played the role of Fox Mulder on the sci-fi series opposite Anderson's Dana Scully Duchovny said that while he feels he 'could've handled better,' he thinks that the underlying hostilities between the two actors helped their onscreen performances.