When the child Arthur’s father is murdered, Vortigern, Arthur’s uncle, seizes the crown. Robbed of his birthright and with no idea who he truly is, Arthur comes up the hard way in the back alleys of the city. But once he pulls the sword Excalibur from the stone, his life is turned upside down and he is forced to acknowledge his true legacy... whether he likes it or not.

When Mary finds herself at the center of a public scandal and the family faces financial strife, the entire household grapples with the threat of social disgrace. The Crawleys must embrace change as the staff prepares for a new chapter with the next generation leading Downton Abbey into the future.

The beloved Crawleys and their intrepid staff prepare for the most important moment of their lives. A royal visit from the King and Queen of England will unleash scandal, romance and intrigue that will leave the future of Downton hanging in the balance.

The Crawley family goes on a grand journey to the south of France to uncover the mystery of the dowager countess's newly inherited villa. Meanwhile, a Hollywood director seeks to film his latest production at Downton.

Four old school friends reunite to attempt the epic coast to coast walk, across the United Kingdom. As their journey unfolds, this comically incompatible foursome walk full tilt into their mid-life crises.