What impresses me is the way the series follows up numerous implications instead of just focussing on Mark's investigation. Some people are hopeful, some despairing. The naive children think it's a fun game. Mark's friend from AA hopes the crisis will bring everybody together.
My only criticism is that it's unrealistic that Mark's team seems to be the only people looking into this, even though they explained about the feds in this episode. What about the governments of England? The European Union? Japan? China? Are they just sitting back and saying "Hey, weird things happen"? Mark's team ought to be making contacts and comparing notes -- and probably needs more people.