The first episode of Downton Abbey aired, introducing viewers to the aristocratic Crawley family and their servants.
The second season of Downton Abbey premiered, continuing to explore the social and political changes of the early 20th century.
The third season of Downton Abbey premiered, delving deeper into the lives of the Crawley family and their staff.
The fourth season of Downton Abbey premiered, featuring new storylines and characters alongside returning favorites.
The fifth season of Downton Abbey premiered, continuing the intertwined personal and historical narratives.
The final season of Downton Abbey premiered, concluding the series and resolving many story arcs.
The first Downton Abbey feature film was released, continuing the story of the Crawley family and their estate.
It was announced that a sequel to the successful Downton Abbey film would be produced, further extending the franchise.
Robert Crawley marries Cora Levinson, bringing a wealthy American heiress into the Crawley family.
Patrick Crawley, heir to Downton Abbey and distant cousin to the Crawley family, dies in the sinking of the Titanic.
Matthew Crawley, a distant cousin and solicitor, inherits the estate as the new heir after Patrick's death.
Matthew Crawley and Lady Mary Crawley become engaged, promising to secure the future of Downton Abbey.
Matthew is wounded and hospitalized during World War I, jeopardizing his relationship with Mary.
Matthew Crawley and Lady Mary marry, uniting the family and the estate's future.
Matthew tragically dies as a result of a car accident causing great grief for Mary and the family.
Lady Mary gives birth to Matthew's posthumous son, George Crawley, ensuring the family line continues.
Tom Branson, the former chauffeur, marries Lady Sybil, representing a cross-class union at Downton.
Lady Sybil dies giving birth to her daughter, causing sorrow among the Crawley family and staff.
The infant daughter of Tom Branson and the late Lady Sybil is born, named Sybil.
Downton Abbey and the Crawley family adjust to changing social and economic conditions in post-war Britain.
