AIUI, you may record for your own entertainment what you hear publically as long as you do not invade someone's privacy by recording private conversation w/o the other person's knowledge.
This is not piracy, it's paranoia.
But then sharing what you record over eDonkey certainly is piracy, especially as what I thought he was asking for was the TV series that has been released on DVD. If I start posting links to copyrighted material then I'm sure I'd be breaking mailing list rules. Anyway, back on topic. Just to add one other suggestion, now that I know you only want to capture audio, if all else fails you can feed a cable from your line out port to your microphone port and record the sound directly. You'll lose a bit of quality unless your sound card has optical ports but at least you'll have a copy.