Boardwalk Empire, only season 1 is available for prime users. A lot of the stuff is like that, some seasons on prime, some you get to pay for or wait until they become available for prime users in a year or two, or three.
And of course, no Game of Thrones.
Basically, the rule of the thumb for HBO on Amazon prime is, if the the show wrapped up several years ago and was any good, you probably have already watched it once or twice through. If you haven't, it is probably a newer show and all the seasons aren't available on prime, if at all.
-KeithP
Three years is, I believe, the magic number.
