Season 21 episode 1 torrent can be found at 

standard def:

http://torrage.com/torrent/1C6332DD5D0533B66AC18EB7F45A31AF729D06E1.torrent

720p:

http://openmagnet.net/mirror.php?hash=1C6332DD5D0533B66AC18EB7F45A31AF729D06E

1080i : 

http://www.openmagnet.net/?hash=BCD4E2BAA2D63015F8CEEA288C6D958190311AE8