: Indicates "2 Channel" audio, meaning the file has Stereo sound rather than 5.1 Surround Sound.

: The specific episode—Season 1, Episode 2 (titled "Nature's Empty Chair"). Source and Resolution

: The tag for the release group ( PSA Risks ) that encoded and distributed the file. They are known for high-compression "mini" encodes that maintain visual fidelity while saving storage space.