Mary informs Bertie that Marigold is Edith's daughter; Mrs. Patmore's bed and breakfast faces a scandal: adulterers stayed the night; Molesley becomes a teacher; Thomas attempts suicide.
The hospital board approves the merger; Daisy tries to block the burgeoning romance between Mrs. Patmore and Mr. Mason; Henry tells Mary how he feels about her.
Violet tries to sway Robert to her position regarding the hospital; Edith fires her editor; Thomas has a job interview; Denker digs up dirt on Spratt.
Mary and the family attend one of Henry's motor races; Mrs. Patmore opens her bed and breakfast; Mrs. Hughes tricks Mr. Carson into doing the housework; Bertie asks Edith to marry him.
Season 5 of "Downton Abbey" commences: The election of a working-class prime minister upends the order of things; and leads to Robert being snubbed by the village.