Around the remote: Chuck Barney's TV picks for March 6-12

DON'T MISS: "Downton Abbey" finale - After six seasons of sibling rivalries, class conflict, beautiful frocks, sex scandals, snide one-liners and way too many tea parties to count, our favorite British import bids farewell via a two-hour series finale stuffed with eventful developments for the Crawley family and their faithful servants. Saying goodbye to a beloved show is never easy, but we're trying our best to maintain a stiff upper lip. 9 p.m. Sunday, PBS. …