 The Puerto Rican scenes were filmed at the Seymour Demonstration Forest in North Vancouver District , while the Plaza of Nations doubled for the Miami Airport . Gillian Anderson revealed on Late Night with Conan O 'Brien that when she and Duchovny were filming the final scene escaping the Blue Berets , the actors portraying the soldiers had to pretend to shoot their guns with their own sound effects , and that " it was very hard to focus without breaking out laughing . " At the airport , Scully is pretending to read the fictional Miami Post Tribune but closer inspection reveals that she is actually reading the " Facts And Arguments " page from Canada 's national paper , The Globe and Mail . The flight manifest that Scully is scanning in search for Mulder is a list of X @-@ Files fans . 
