This is a terrific show. Great acting, production, writing. This, Spartacus, and maybe Rome, are the only TV shows I have found worth watching for several years. But any TV show, after 3/4 years, the plots start to get very contrived, so it is probably just as well that it will not go past a 5th season.
Every show should end by the 3rd and 4th season. Sopranos barely survived the 5th as an example. I just download thru bit torrent the shows I like like Game of Thrones (avoiding giving HBO a ratings point), Camelot and even the new Thundercats.
The GI Joe series that just ended is also recommended: a cartoon that defended the US military and showed respect for it, even though it was in the wrong. No lib nonsense which is a miracle. (I have a sister in high school so that’s how I discovered it)