Any good tv series on Netflix that will keep me busy for a while?

I'd prefer if it were a long series, so that it can keep me busy for a while. I'm not looking for anything too inappropriate or childish either, preferably somewhere in the middle. I'm 14 so somewhere around there? Also, it needs to be age appropriate for my 12 year old brother as well. I've already... show more I'd prefer if it were a long series, so that it can keep me busy for a while. I'm not looking for anything too inappropriate or childish either, preferably somewhere in the middle. I'm 14 so somewhere around there? Also, it needs to be age appropriate for my 12 year old brother as well. I've already watched supernatural, dead zone, ghost whisperer, and lost. Lost is definitely my favorite tv show and there's probably no other show out there like it. So, any suggestions? (:
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