Yes, I have seen this show although at the moment it is off air over here. I started watching late into season one and have watched as many episodes as possible since then. I haven't yet watched the last few episodes of season four since they cut it off before the end of the season but I hope they put it back on sometime next year. It is unlikely that would happen this year.
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In the End, we will remember not the words of our enemies but the silence of our friends ~ MLK