‘Downton Abbey’ brings cool TV crowd to America’s PBS

Move over, ‘Mad Men’ and Kim Kardashian. There’s a new darling in U.S. pop culture, with a much posher accent and even fancier clothes. British World War One-era drama ‘Downton Abbey’ and its colorful cast of countesses, cooks and kitchen maids has taken America by storm, dominating modern social media and bringing millions of new, young viewers to the often staid world of public broadcasting.