If you are looking for scholarly analysis of this specific season's impact: : The paper Lessons from Westeros: Gender and power in Game of Thrones
If you already have the video files and are looking for matching subtitle tracks for a WEB-DL release, the following community sites are frequently updated: OpenSubtitles: A large database for Game of Thrones subtitles in multiple languages. Often carries specific SRT files timed for WEB-DL releases. Search Tip: game of thrones season 05 720p webdl