: The name of the psychological thriller series set in an Arctic town. 3x04 : Indicates Season 3, Episode 4 .
: This means the source of the video is a high-definition television broadcast. "Mux" (short for multiplex ) indicates that different streams (like audio from one source and video from another) have been combined into a single file. Fortitude 3x04 HDTV Mux Ita Eng Ac3 Earine
: Refers to the audio codec Audio Codec 3 , also known as Dolby Digital , which typically supports 5.1 surround sound. : The name of the psychological thriller series