Examining how Ian Ball and Michael Fagan both created security breaches at a time when the British Royal Family was believed to be untouchable, and investigating how deadly their intentions were.

The late Princess Diana's trusted butler, Paul Burrell, is charged with stealing items from her estate and becomes the defendant in a sensational trial.

Bolsheviks claimed to have executed Russia's royal family in 1917, but questions remain whether some of them may have escaped; forensic science is applied to the Romanov mystery.

Nepal's King and his family are gunned down at a family gathering.

Palace statements raise questions about possible foul play after Princess Grace of Monaco is killed in a car crash; investigating whether the palace is covering up the truth about the accident and who was driving.

Dark secrets threaten to tarnish the images of two of the world's most beloved royals.