SPECIAL: This is a public TV pledge special, which means it’s just as likely to be shown on another night and time as during this suggested national airing. But find it, and revel in it. Hosted by Jim Carter (pictured), who played the butler Mr. Carson in all six seasons of Downton Abbey on PBS. And he’s not through yet: A new Downton Abbey movie is in production now for release this September, and this special includes a sneak preview of it – as well as scenes from the six seasons of the TV series. Watch for Dan Stevens, now starring on FX’s Legion, as Matthew Crawley. Check local listings.