LONDON — There is no end in sight to the upstairs-downstairs drama of “Downton Abbey.”

Britain’s ITV network has commissioned a sixth season of the popular costume drama from co-producers Carnival Films and Masterpiece. It will start filming early next year.

The Emmy Award-winning show follows the fates of the aristocratic Crawley clan and their servants amid the social upheavals of the 1910s and 1920s.

The fifth series of “Downton Abbey” is currently airing in Britain and starts Jan. 4 on PBS in the United States.