I searched but couldn't find any mention of this HBO show here, so I want to recommend it to everyone. It's just finished its first season (10 parts), and it was a class act.
The series is a medieval high fantasy, set in a fictional world with supernatural elements (which are pretty low-key). It's based on George RR Martin's 'A Song Of Fire And Ice' series, with the first season covering the first book (I haven't read any of the books btw). It's a story about powermongering lords and their noble families who rule over their homelands but answer to the king who sits on 'The Iron Throne'. The kingdom is seriously unstable on the inside, but also being threatened by mysterious outside forces.
Instead of being a straight good-vs-evil story, basically all of the characters are flawed in one way or another, and some of them are just fucking vile. I think it was the producer who called it something like 'Sopranos meets Lord Of The Rings', which is vaguely accurate (well ok, not quite). There's sex, nudity, harsh language, gore, and all the other shit that makes it qualify as an HBO show - so it's not for little kiddies. But the script is major quality, the acting is excellent, the production is spectacular for a TV series, and I was hooked from beginning to the end.
So if you get an opportunity to watch this, definitely give it a shot.
BUT, if you've already seen it, could you please put spoiler warnings around any major plot points you might want to mention.