| Parameter | Ideal Value | |-----------|--------------| | Format | AVC (h.264) or HEVC (h.265) | | Bitrate mode | Variable | | Nominal bitrate | >5,000 kbps (h.264) / >2,500 kbps (h.265) | | Frame rate | 25 fps (UK original) or 23.976 fps (US conversion) | | Color space | YUV 4:2:0 | | Audio | AAC LC or E-AC-3, 192+ kbps |

Note: For archival purposes, a 1080p WEB-DL of this episode is the best consumer-available copy until/unless a Blu-ray is released (unlikely for this series).

Seek a release with h.264 + 5.1 audio + English subs , file size between 2.5 GB and 4.0 GB . Avoid “YIFY” or “x265-10bit” small-file re-encodes unless you are bandwidth-limited—they will lose fine detail in the show’s signature grey, rainy atmosphere.