4. The Colony (2009)
The Colony is a reality show on the Discovery Channel that originally aired in 2010. The show is basically a controlled experiment where a group individuals are placed in an isolated urban setting, where a hypothetical global catastrophe has occurred and the group has to try to rebuild with whatever they can find. They have basically an entire city to themselves and they can take over any property or resources they wish, but there are hired actors who act as thugs and looters to threaten and terrorize the members of the group to test their boundaries.