Apple removes Heroes season from US store

Here I was, being a good iTunes user and buying episodes of Heroes as I had time to watch them. Now, halfway through the season I went to download the next episode and received instead an error message. Heroes is no longer available in the US store. What's up with that? No warning nothing.

Normally I have been pretty happy with Apple customer service but if they could have at least sent an email to those who have purchased some of the season I would have been happy to purchase the rest before the deadline. Now I am halfway through the season and can't find where to get the rest of it to watch on a Mac.