Viewers can watch selected full episodes of "Downton Abbey" online at PBS.org. As of August 2015, Amazon Prime Instant Video owns the exclusive subscription streaming rights to "Downton Abbey," and the first five seasons are available to subscribers. Additionally, iTunes sells downloads of "Downton Abbey" episodes.
"Downton Abbey" is a British period drama set in a fictional Yorkshire estate. Created by Julian Fellowes, the highly rated series follows the lives of the Crawley family and their friends and servants during the time of King George V in the early 20th century. Cast members include Hugh Bonneville, Laura Carmichael, Elizabeth McGovern, Brendan Coyle and Maggie Smith.