Board Thread:Spoilers!/@comment-26196542-20150930211355/@comment-11468987-20151002193552

Yeah, I think that Arthur may be a villain as well. In the latest 5x02 sneak peek he seems to be acting a little weird. And his casting call says that he is manipulative and that he holds grudges. They wouldn't put those things in there for no reason, so I think it will come into play eventually.