Watch the full-length episode at “https://www.pbs.org/video/2365651729/?Utm_source=youtube&utm_medium=pbsofficial&utm_campaign=downton_2016” (US Only) Mary and Branson plot to party in this scene from Downton Abbey, The Final Season, Episode 6, airing Sunday, February 7, 2016 at 9/8c on MASTERPIECE on PBS. #DowntonPBS