Hello hauntvictim,
I would be eager to download and watch the episodes I purchased as well. I found a couple of resources that might help with downloading these purchases.
First, I recommend checking to see if the download was interrupted. You can use the steps in this article:
iTunes: How to resume interrupted iTunes Store downloads
http://support.apple.com/kb/HT1725
If the episodes don't download after following the steps in that article, I recommend trying to download the episodes from your list of past purchases. As long as you are signed in with the same Apple ID you used to purchase the Season Pass, you will not be charged again. You can find the steps to do this in the following article:
iTunes 11 for Mac: Download previous purchases from the iTunes Store
http://support.apple.com/kb/PH12283
If you are still not able to download the episodes, I recommend reporting this issue to the iTunes Store:
How to report an issue with your iTunes Store, App Store, Mac App Store, or iBooks Store purchase
http://support.apple.com/kb/HT1933
Thank you for using Apple Support Communities.
Best,
Sheila M.