If your using the BT clients, BitTornado or Azureus, you can set either client to not download the episodes you don't want. I'm not familar with how to do it on Azureus but with BitTornado, when you open the torrent and your BT pops up, click on Details. Then you'll get the list of the episodes in the torrent file. Right-click the episodes, then set it to Never Download.