When Catherine Flannagan and her younger sister Margaret moved to Liverpool from Ireland in the late 1800s, they were among the tens of thousands of poverty-stricken Irish laborers and their families who left Ireland during the potato famine to find work in Britain during the Industrial Revolution. To make their money, Catherine and Margaret established and ran a boarding house. In short time, the house was filled to capacity with lodgers. But there was one problem: guests were dying in suspiciously similar circumstances.

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Nicola Sacco and Bartolomeo Vanzetti were Italian immigrants who were – controversially – convicted of murdering Alessandro Berardelli and Frederick Parmenter, a security guard and a payroll clerk, during an armed robbery of the Slater and Morrill Shoe Company in Massachusetts. About a century has passed and experts -- and armchair experts, too! – continue to debate this case, but not whether they did or didn't do it. They continue to debate one very big thing: whether or not Sacco and Vanzetti received a fair trial.

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Mary Blandy was desperate to marry, but none of her suitors met the stringent standards set by her father -- until she met William Cranstoun, son of a Scottish peer. But her engagement to him turned out to be her downfall; William was already married. When it was divulged, her father did not approve the engagement, but William "had a method of conciliating [her father's] esteem" -- and it involved feeding her father a 'love powder' to soften him up a bit. The love powder turned out to be arsenic, and Mary killed her father by administering it. Though she claimed she didn't know, there were clues she maybe did. The question remains: Was she a partner to this crime, or wasn't she?

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