I googled
www.pbs.org and came up with lots on Downton Abbey including viewing seasons 2 and 3 online -- investigate this site and enjoy -- like many viewers, I can't understand why an actor would want to leave such a popular series and a paycheck for working on it -- I too am hooked and looking forward to next season, hopefully soon, although judging from articles on making the series, preparation for filming takes a lot of time!!