The official Blu-ray release of the Director's Cut typically includes the following subtitle options as standard features: English (SDH) : Subtitles for the deaf and hard of hearing. Third-Party Subtitle Sources
You can find .srt files for the Zodiac Director's Cut on several reputable subtitle databases. Look specifically for files tagged with "Director's Cut" or "162 min": zodiac directors cut subtitles
One of the most significant changes in the Director's Cut is a two-minute audio montage played over a black screen. This sequence uses news broadcasts and popular music to signify the passage of four years. The official Blu-ray release of the Director's Cut
Subtitles for the Director's Cut are most reliably found on official Blu-ray and 4K releases: zodiac directors cut subtitles