I have a bundle of Downton Abbey that is no longer for sale on iTunes and I can play it, but (for a while, they may have fixed it) at the end of an episode you had to navigate to the next episode by selecting the show and scrolling horizontally through every single episode. Technically possible but very irritating.

(Funny thing: I was watching the show when the switch happened… I watched two or three with the obvious play next episode in series behavior and then it suddenly stopped working… apple support finally told me it seems like it was related to it being taken off in favor of a bundle with the film included.)