The ZEE5 app allows you to download episodes officially to watch later without an internet connection.
Searching for the series on sites like Tamilrockers or other "new" proxy links poses several risks:
When you watch via illegal downloads, the creators (TVF) and the platform don't receive the support needed to fund future seasons or similar quality content. Where to Watch Officially
You get 1080p quality with professional subtitles and clear audio. Support Good Content