The legality of torrent downloads is a gray area. While the technology itself is not illegal, using it to download copyrighted material without permission is against the law in many countries. The Big Bang Theory Season 2 is copyrighted content, and downloading it via torrent without authorization could infringe on copyright laws.
When users search for "top torrent downloads," they are usually looking for specific technical standards. For a show like The Big Bang Theory , you should prioritize: