There are several reputable databases where you can find high-quality, community-vetted SRT files for this specific episode:

: One of the largest subtitle repositories globally. It is excellent for finding varied versions of the file, such as those synced for Blu-ray, WebRip, or DVD releases.

: If you use VLC Media Player, you can use the VLSub extension to search and download subtitles directly from within the player while the movie is playing. Why "The Abominable Bride" is a Must-Watch

: Highly recommended for its clean, modern interface. You can find the Abominable Bride subtitles here in multiple formats.