James Douglas, 4th Earl of Morton was a Scottish nobleman. He played a leading role in the murders of Queen Mary's confidant, David Rizzio, and king Henry Darnley. He was one of the last of the four regents of Scotland during the minority of James VI and I. He was in some ways the most successful of the four, since he won the civil war that had been dragging on with the supporters of the exiled Mary, Queen of Scots. However, he came to an unfortunate end, executed by means of the Maiden, a predecessor of the guillotine.

David Rizzio or Riccio was an Italian courtier, born in Pancalieri close to Turin, a descendant of an ancient and noble family still living in Piedmont, the Riccio Counts di San Paolo e Solbrito, who rose to become the private secretary of Mary, Queen of Scots. Mary's husband, Lord Darnley, is said to have been jealous of their friendship because of rumours that Rizzio had impregnated Mary, and he joined in a conspiracy of Protestant nobles to murder him, led by Patrick Ruthven, 3rd Lord Ruthven. Mary was having dinner with Rizzio and a few ladies-in-waiting when Darnley joined them, accused his wife of adultery and then had a group murder Rizzio, who was hiding behind Mary. Mary was held at gunpoint and Rizzio was stabbed numerous times. His body took 57 dagger wounds. The murder was the catalyst of the downfall of Darnley, and had serious consequences for Mary's subsequent reign.