There are two major caveats to using Addic7ed. First, . Second, the site can be slow to load and features many pop-up ads, which can be a nuisance. But if timing accuracy is your absolute priority, the extra steps are worth it.
If you own the series on DVD or digital files and need external .srt files, these third-party repositories are widely considered the best for TV show subtitles: house md english subtitle top
Use the F1 and F2 keys to shift the subtitle timing backward or forward. There are two major caveats to using Addic7ed