This episode reveals fresh insights into how George V rescued the monarchy by dumping his family's German roots, and explores the Edward VIII abdication crisis

In 1947, as Britain suffers from crippling post-war austerity and the worst winter on record, a lovesick Princess Elizabeth and her ailing father, George VI, visit South Africa on a fraught royal tour

The story of Prince Philip, the Windsors' most radical moderniser, and how in the 1960s he harnessed the medium of television to revamp the Royals' public image.

The fourth episode of the gripping saga of the world's most famous dynasty features intimate letters from the Prince of Wales and previously unseen family photos of the aristocratic relative earmarked by Charles' great uncle for him to marry in the late 1970s. Charles was determined to do the right thing as Prince of Wales and avoid the mistakes of his great uncle King Edward VIII, who abdicated to marry the divorced woman who he loved, and almost brought the House of Windsor to its knees. Another great uncle, Lord Mountbatten - an ambitious man of boundless energy and ego - wants to cement his position at the heart of the House of Windsor by acting as kingmaker to Prince Charles, who calls him his 'honorary grandpa'. The programme reveals how Mountbatten arranged a secret meeting in Paris between the exiled King and Charles. But, rather than fearing 'Uncle David' as a warning from history, Charles describes how he sees him as an object of sympathy, even affection.

This episode examines the huge challenge that Diana's popularity and tragic death posed to the royal family.

Prince Charles is the most outspoken heir to the throne in the Windsors' history and has promised a radically different vision for the monarchy. But will his reign make or break the Windsor dynasty?