Behind-the-scenes tales of palace retreats, exploring former royal yacht Britannia'a hidden history and unravelling why its loss caused such public sorrow on its decommissioning at Portsmouth dockyard. Plus, the secrets of George IV's seaside palace Brighton Pavilion, while Kate Williams tells the astonishing story of how George V's doctor hurried the dying monarch to his death at Sandringham in order that its could be reported in the morning's edition of the Times.

• King Charles III of the United Kingdom
• Samantha Bond
• Prince Philip, Duke of Edinburgh