When the Pazzi family became entangled in a plot to assassinate Lorenzo and Giuliano de'Medici, the conspiracy grew until it reached the steps of the Vatican itself. Learn more about this coup attempt -- and its ultimate result -- in this episode.

Although prehistoric societies hunted horses for food, they quickly realized the animals were more useful as a means of transportation. Tune in as Katie and Sarah explore one of the most specialized types of horses -- battle steeds -- throughout history.

The Death of Lord Darnley

In February of 1567, Lord Darnley lay sleeping in a house called Kirk o'Field when it exploded. He was certainly dead, but when his body was discovered it seemed that he died of strangulation ... and here the mystery began. Learn more in this episode.

Elizabeth I never married. Instead, she encouraged (and avoided) many suitors without making a commitment. Additionally, many people believed Elizabeth was in love with a man named Robert Dudley. Learn more about Elizabeth's great love in this episode.

Harry Houdini, Master Mystifier

Once known as the world's greatest magician, Harry Houdini's reputation still resonates with modern fans of illusion and magic. Join Katie and Sarah as they explore the fact -- and fiction -- surrounding the spectacular Harry Houdini in this episode.

In 1809, Meriwether Lewis died of gunshot wounds -- but how did this happen? Historians still debate the circumstances involved. Join Katie and Sarah as they explore the facts -- and sensationalism -- surrounding the mysterious death of Meriwether Lewis.

A History Mystery: the Mad Trapper of Rat River

In this episode, Sarah and Katie take a crack at one of Canada's strangest mysteries: The Mad Trapper of Rat River. Travel back to 1931, when a man calling himself 'Albert Johnson' led the Canadian police on a 150-mile chase -- all without saying a word.