Game of Thrones has some amazing action sequences, and every now and again HBO shows off the storyboards that explain how a moment was laid out and ultimately executed.
The rest of this post contains images that could be construed as spoilers if you're behind on the show and / or a giant baby.
Here's a look at the re-introduction of Benjen Stark.
And here's one from the scene that explains the genesis of the White Walkers.
This is neat stuff, and gives you a fun look at how the show looks in its earliest stages.