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Season 1 - Sep. 26, 2010
Season 2 - Sep. 18, 2011
Season 3 - Sep. 16, 2012
Season 4 - Sep. 15, 2013
Season 5 - Sep. 21, 2014
Season 6 - Sep. 20, 2015

Downton Abbey Season 6 Episode 4
HD
Overview:
As Tom and Sybbie settle back into life at Downton, the family and servants are surprised by the return of another old friend in unexpected circumstances.