Some questions......

Being a huge fan of the movie (And since I also read the book adaptation of the screenplay), I'll try to answer these the best I can:


"The signs on Brayker's hand, what do they do? Just signal him when he's final fight with the deamons is coming?"


He sort of explains this in the movie, but yeah... They're basically there to tell him when it's his time to pass the key on to the next Demon Knight.


"It seemed to me that at the rate Brayker spilled blood out of the key to create barriers, the key would dry up after one day, much less last 60 or so years that he's been on the run. Can he use his own blood to refill it as needed or does his blood become holy only when he's inaugurating his successor? This leads me to the next question."


I think the idea behind the key was to keep refilling it so that it would mix with Christ's original blood. And by keeping the key filled, it would at least keep some trace of J.C.'s blood in there, therefore giving it it's power.

As to how the key stayed filled for 60 years... One would have to assume that he had many battles with the Collector, and many opportunities to fill the key up (Not with his blood, but possibly with the blood of others). It's one of those plot-holes that could be explained in any number of ways.

One thing to remember is that he says that most of the blood "belonged to a man named Dickerson" who he fought with during the war. He could be saying "most of it" because it had been passed down so many generations, but he could also mean it had been refilled recently.


"Was Brayker fighting the deamons non-stop since his inauguration in WWI, or was this the only fight?"


He'd been on the run since then, sure. You would have to assume that the only reason he stopped and fought the demons at the motel/church was because he had found Jeryline. I'm going to say that he probably had brief fights here and there on the road, but nothing compared to that final battle.


"Can't the deamons pick up sledgehammers and break through walls instead of waiting for the barrier to be removed from the doorways and windows?"


If the barriers just worked on a physical level, sure. But the blood works on a (I hate to use this word) magical level. I imagine that one of the ways the blood worked was that whenever they came within a close proximity of it, it would drain them of their power. Hence rendering such tools as sledgehammers or axes useless against it.


"How exactly did Roach break the barrier in the basement?"


Again, one would have to assume that the explosion from shooting the Homer demon (I dunno why that makes me giggle everytime I write that) did a number of things to the seal. Note how easily Roach was able to wipe off the other blood seal with a sponge. One would have to figure that an explosion would definitely scrapped some semi-moist blood off of the floor.


"Can Brayker be killed by something other than a deamon or is he pretty much invulnerable?"


Having the key seemed to slow his aging process, but he obviously wasn't immortal. After the opening car crash, he was limping pretty bad. This was probably to show that he wasn't a superhuman or anything, just a guy that was pretty good at surviving these things... at least up until the end.

Most of these are just my theories on the movie. Take them for what you will.