(AP) -- HBO's Internet streaming service, which gives subscribers access to its shows on PCs, smartphones and tablets, is going back to where it all started: the TV.

HBO Go will be available on Roku Inc.'s Internet set-top boxes at the end of this month. The boxes, which start at $50, connect to a broadband line and display movies and TV shows from sources such as Netflix and Hulu on a TV set.

As before, HBO Go is only available for free to those who have a conventional cable subscription to HBO, a unit of .

Not all are eligible. For instance, subscribers with Inc., which is separate from Time Warner Inc., don't have access because of a dispute between the cable company and HBO.