Summary: <p>America's favorite aristocrats are returning to the U.S. PBS' "Downton Abbey" is the British period drama that chronicles the lives of the Crawley family: Lord and Lady Grantham, their three daughters and a host of servants who keep their grand house running. The show digs into issues of class, gender and sexuality during an era of rapid change. Season four of the show premieres on Sunday, Jan. 5 on PBS stations around the country. Today on The Diane Rehm Show, catching up with the Crawleys of Downton Abbey.</p>
