Cora’s mother, Martha Levinson, is among the many wedding guests that descend on Downton for Matthew and Mary’s wedding. Lord Grantham discovers that his massive investment of Cora's fortune in the Grand Trunk Railway has failed, leaving the estate near bankruptcy. Matthew learns that he may stand to inherit a large amount of money from Lavinia's father, but he declares that it would be impossible to keep the money because he feels that he betrayed Lavinia and her father. Sybil and Branson, who remains highly vocal about his political beliefs, also manage to make the return to Downton for the wedding. Matthew ultimately chooses Branson to be his best man, and finally the long-awaited marriage becomes a reality.
Premiered in UK as Season 3: Episodes 1 and 2
Episode number: 43x1 Production Number: 4301 Airdate: Sunday January 06th, 2013 Special Runtime: 120 Minutes