Download time is 311532 hours?

I purchased a season of 30 Rock and the first few episodes downloaded normally. The 5th episode said it would take 300000 hours so I tried to stop the download and ended up having to shut down iTunes through control/alt/delete. I unplugged modem and router, restarted my computer, plugged everything back in and the episode said it would take 300k hours again. I waited until this morning - restarted & everything else.....same response - 300k hours!

I cannot pause the download or stop it so that the rest of the episodes will download!

Thanks in advance!