Downton Abbey has announced new characters as it begins filming Season 4. Perhaps most interesting among the casting is Tom Cullen as Lord Gilligham, “an old family friend who has a long history with newly widowed Lady Mary (Michelle Dockery).”
Siobhan Finneran, who plays Lady Cora's maid O'Brien, will not be returning to the series. But Shirley MacLaine is scheduled to reprise her role as Cora's mother, albeit not until the holiday episode.
