and the blood of christ

Not Tyrion, the hand that Jon's wolf found beyond the wall. It reanimated and it had no brain, so how does one explain that? Viruses that cause muscles to contract?

Also, I thought that the wight walkers could be killed with obsidion and it didn't have to be in the brain?

So that opens the dispute. Are white walkers zombies? I don't really know.

nt.

Isn't Venus doing something rare tonight too?

In Romero's Night O The Living Dead it was radiation.

The Others, known as the "White Walkers" among the wildlings, exist north of the Wall. Before the events in the Novel, the Others had supposedly not been seen for many thousand years. So far the Others have appeared in the flesh only twice in the whole saga and their purpose remains unknown at this time.

...

The Others appear in the prologue to AGoT as tall and gaunt with flesh pale as milk and blue eyes, deeper and bluer than human eyes, burning like ice. The White Walker who married the Night's King is similarly described as having skin as pale as the moon and eyes like blue stars.

....

Wights are dead men or creatures raised up by the Others, seemingly when touched by the cold that accompanies them.[4] Men who fall in battle against the Others must be burned, or else the dead will rise again as their thralls.

http://awoiaf.westeros.org/index.php/Others

So in the season finale, that was a White Walker horse king who was commanding a loose battalion of white walkers and wights. It's the wights who may be Zombies, resurrected by the white walkers?

And who is the Night's King? Is that something that happened centuries before too?

Using the unholy power of the negative planes. You cannot catch zombie disease, you must be animated. What you see in 28 days later are not zombies, they are infected with an organic parasite. The White Walkers appear to have some semblance of intelligence so they cannot be zombies either. They might be a higher form of undead or something else entirely. I vote for the latter because any higher undead would have attacked and drained Samwell without hesitation.

Anyone who has read the books, feel free to pitch in.

He's around forever, and somehow in spite of walking all over creation and in themidst of a ton o' starving, never loses an ounce. He has MY metabolism.

Not until next season. Reading the books would ruin the show for me. Just as if I had read the books ahead of time I'd probably not watch the show.

In fact, this season has had so much material to condense that it seems like the book and the series are very different. The TV show is more like a Reader's Digest version. So reading the books is never a waste, there is much more to learn in them.

I've read them all and still anxiously await each episode.

And that's why I'm not going to read them now. They will ruin the show for me. I hate reading books and then watching them be ruined in movie form like Lord of the Rings and Harry Potter. I love those books, hate the movies. I'll read these later.

To prevent us from discovering solarbanite.

It is all part of Plan 9.