After analyzing dozens of platforms for "supernatural english subtitles season 1 free," here is the champion:

Depending on your location, several services offer shows for free with ads.

A popular destination for fans to upload and download subtitles for specific versions (Blu-ray, WEB-DL, etc.) of Season 1. OpenSubtitles: One of the largest databases for multi-language support. If you are watching on a supported web platform, tools like can sometimes extract captions directly from the video URL. A Note for Purists: The Music License