Subscene.com (archived via Wayback or mirrors)
Addic7ed.com
GitHub subtitle repositories (e.g., tpn/pbsubs – fan‑synced for 720p WEB‑DL). Prison Break Season 1 Subtitles English Download 720p
While not a "download" of a standalone file, both platforms allow app-based downloads. Subscene
Downloading the video is only half the battle. If you have a 720p copy of Prison Break but the subtitles are out of sync or for the Director’s Cut, you will have a frustrating experience. Addic7ed