The death of Robert Dudley's wife in 1560 caused uproar, as the nobleman was Elizabeth I's alleged beau. Explore the motives for murder.
Richard III, whose body was recently exhumed, is linked to the deaths of two princes in the Tower of London in 1483. Experts consider his guilt.
The infamous Borgia family were devastated when favourite son Juan was murdered in 1497. Can modern experts crack the case and finger the killer?