Mary attempts to build some bridges with her sister but Edith and her secret continues to be a problem. Henry gets used to being a husband, but Charlie's death is hard to get over. Carson finds it hard to keep up with the changes. Spratt feels threatened by Denker's interference. Isobel is given some devastating news. Robert finds out how valuable it is to be independent. The staff and servants get ready to see in 1926 in with a unforgettable New Year's Eve celebration.