ITV has released a trailer online for Downton Abbey Season 6. The final season of the series is set in the year 1925. The trailer does not reveal much, but it looks as if Downton will be either sold or closed, with the family and servants going their own ways. The series will debut in the UK on Sept. 20th. It will be shown in the US on PBS stations, starting Jan. 3rd, 2016.