X-Files, The /ˈeks faɪlz/
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 aliens (=creatures from other worlds) and other paranormal events. The programme is also known for the catchphrases‘The truth is out there’ and ‘Trust no one’.

[TahlilGaran] Dictionary of Contemporary English ▲