Just found this little app - http://tvshows.sourceforge.net/
It's great, no more searching through the torrent sites to find the telly you missed. As an NTL user (who recently had Sky 1 pulled from our channel list) it's a fantastic way of grabbing the latest Lost episodes.
You'll need a BitTorrent app, just choose the shows you want, close the app and it does the rest.
Highly recommended.