George has ambitious plans to build a railway line between New York, Chicago and Los Angeles, but his plans are met with resistance; Bertha is busy preparing for the Duke's arrival.
Agnes and Ada welcome the Scotts.
George negotiates with the Duke.
Bertha deals with unwanted rumors in the press and the surprise arrival of her sister Monica.
Gladys adjusts to her changed circumstances; Larry runs into a familiar face; Peggy gets an opportunity from an old colleague.
Mrs Astor discusses the future of her Newport ball with Bertha; Larry receives disturbing news; Mrs Kirkland gets information about Peggy.
Bertha finalizes the guest list for the ball and faces the consequences; Dr. Kirkland makes a decision.
Agnes shares news of her nephew Dashiell's imminent arrival in New York; Bertha decides to back the new Metropolitan Opera House.
George delivers a final decision to Oscar; Peggy is welcomed back into the Van Rhijn household by all but one; Marian meets a new match.
A surprise guest attends Bertha's fundraiser; Ada organizes a luncheon for Mr. Forte; Peggy presses Mr. Fortune about Tuskegee.
Bertha angles for position with a visiting Duke; with Marian's help, Ada continues to see Mr. Forte; Peggy travels to Alabama.
After sharing her news, Ada questions moving ahead without Agnes' support; Peggy experiences the dangers of the South.
As George heads to Pittsburgh to deal with the potential strike, Bertha learns that the Duke will return for the Metropolitan Opera's opening night; Bannister tries to retrieve an incriminating letter from the Russell house.
As New York celebrates a historic event, Bertha reconsiders her loyalty to the Met while Marian has doubts about her future.
In 1882, Marian arrives at the home of her "old money" aunts Agnes and Ada, whose new neighbors vie to break into New York high society.
Marian receives a visit from Tom Raikes, whose legal advice Peggy seeks; the Russells take center stage at a charity bazaar.
An unfortunate development finds George's new rail station under threat; Marian continues to see Mr. Raikes despite Agnes' warnings.
In the aftermath of a tragedy, George agrees to help Bertha; a visit has a lasting impact on the staff of Russell house.
As George fights to protect his public image, Agnes' status quo is disrupted; Armstrong intensifies her campaign against Peggy.
As Edison's illuminating electricity demonstration sparks conversation, George prepares for a legal battle, and Bannister plots revenge.
Peggy reveals the truth about her past; George's day in court arrives; Marian considers her romantic future.
Marian's grand plan is threatened; Bertha and Mrs. Astor lock horns over Gladys' debut; Peggy is stunned.