Original UK Version: Carson strives to keep standards high with disastrous personal consequences. Lady Rosamund is eager to unearth Lavinia and Carlisle's secret. The death of a wounded officer motivates Isobel and Sybil to see Downton in a different light. Shellshocked new valet, Lang arrives as William gets his call up papers and is love in the air for both Edith and Mary?
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