iTunes Season Pass - trouble streaming episodes

I have bought the season pass (several passes) but when a new episode comes out, iTunes asks me to buy it or download it, but, what I'm used to do is watch it on my iPad without downloading it (stream).

In other words, the thing I loved the most was that I could just click on the episode and watch it, and now, every 3 episodes that come out, one has this issue!!! No matter what TV show, I have this annoying problem that forces me to download the full episode to my iPad (and then delete it, since I do not storage a bunch of episodes there!).

Does anyone know how can I fix that?