Holy moly the last episode knocked me out.
I was so surprised to see several threads all woven together with one big message presented from different angles: each person matters, the ends don't justify the means, and there is a big plan for each of us. These came from unexpected sources in the show also.
I especially love the way that The Machine is putting Root's personal good over it's own survival. If ever there was a Catholic theme in this show, this show had it.