Kristy's back from France just in time to talk about a prolific French killer, Henri Désiré Landru, a reverse black widow who preyed upon the vulnerable. When the police declined to notice a plethora of missing women, the intrepid half-sister of one of his victims ensured that Landru came to justice. 

We also have Venn diagrams of serial killers and model husbands, as well as some sage advice: never let anyone buy you a one-way train ticket. 

Today's episode brought to you by our hero, Marie Lacoste. 

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