Some behind the scenes pics from the CS from this past Monday.  Is that Maggie Smith?

July 22, 2013: Hollywood legend Shirley MacLaine returns to Downton Abbey to host the society picnic. Pictured for the first time, Hollywood actor Paul Giamatti playing new character “Harold Levinson” alongside fellow Downton newcomer James Fox.

http://puzzlepix.hu/cimke/Downton+Abbey/