While not in the keyword, any discussion of a 1080p.H264 BluRay release must mention audio. The Director’s Cut BluRay contains a lossless track. Fincher’s sound design in Zodiac is subtle:
The Blu-ray is famous for its exhaustive "Zodiac Deciphered" documentary and the "This is the Zodiac Speaking" featurette, which interviews the actual survivors and investigators. Zodiac -2007- Directors Cut - BluRay 1080p.H264...