If I do torrent an old batch I tend to force it to download episode 1 first, watch that while ep2 is downloading and so on. But its not like ive torrented a whole series in a while, im watching all new at the moment. Ah, I tend to torrent the whole thing at once, mainly because I find downloading it episode-by-episode tedious if it's not a new series. The wait isn't too bad for me, I can easily max out on torrents with a couple of average seeders. And if it turns out to be [cabbage], I just delete it.