With a powerful alliance with Spain and an heir sleeping in his crib, what could go wrong for glamorous royal couple Catherine and Henry?

Henry invades France, leaving a pregnant Catherine to defend England from Scottish king, James IV. Let the Battle of Flodden commence…

While meg risks all for love, a pregnant Katherine struggles with the nauseating possibility Henry is cheating on her.

Sarah Bunting continues to cause waves above stairs, but this time she may have gone too far. On returning to Downton, Thomas suffers an inexplicable illness and Baxter suspects there’s…

Preparations are under way for Rose’s wedding, but family tensions on both sides threaten to derail proceedings. Edith’s arrangement with Marigold is happily working out, but how long can she…