X-Files, The /ˈeks faɪlz/ BrE AmE
a popular US television ↑ science fiction programme, whose main characters are two FBI agents, called Fox Mulder, played by David Duchovny, and Dana Scully, played by Gillian Anderson. They have many exciting and frightening adventures in their attempts to solve strange mysteries involving ↑ alien s (=creatures from other worlds) and other ↑ paranormal events. The programme is also known for the ↑ catchphrase s ‘The truth is out there’ and ‘Trust no one’.