Did Mary, Queen of Scots murder her husband? The Mail's Robert Hardman and historian Kate Williams examine mysterious 1567 killing of Lord Darnley in new podcast series

It was a royal murder which led to more than 450 years of finger-pointing. In the first episode of Queens, Kings and Dastardly Things, which was released today, Professor Williams - Mary's biographer - explores the theory that the queen herself could have been involved in her husband's murder. Mary had become Queen of Scotland in December 1542 - when she was just a few days old - following the death of her father, King James V. In December 1542, Mary - then just a few days old - became Queen of Scotland following the death of her father, King James V. The new Daily Mail podcast, Queen's Kings and Dastardly Things, airs from today The podcast is presented by Mail columnist and royal biographer Robert Hardman and historian Professor Kate Williams Mary, Queen of Scots, with her second husband, Henry Stuart, Lord Darnley A drawing produced for William Cecil, the chief adviser to Queen Elizabeth I, following the murder of Lord Darnley. In June 1566, seven months before Lord Darnley's murder, Mary gave birth to their only child, the future King James I of England. James Stewart, Mary's half-brother, was one of the suspects in Lord Darnley's murder, as was the Earl of Bothwell Mary, Queen of Scots with her son, the future King James I of England Barrels of gunpowder that had been placed underneath his sleeping quarters were detonated at 2am on February 10.