But watching it in standard definition, or even standard HD, does a disservice to the craft. The makeup team (who won awards for Season 1) outdid themselves with the starvation effects. The locations team found woods that feel ancient and malevolent. The VFX team removed breaths and added snow digitally. In 4K, you see the seams—or rather, you see the lack thereof.

The title asks "Who?" —but the episode is more concerned with "What are we becoming?"

She rewound. Played at half speed. The sound mix, now in lossless TrueHD 7.1, carried a whisper buried under the dialogue — a language that wasn't French, wasn't English, but sounded like wet leather stretching over bone.