In the late-1940s, con-artists Raymond Fernandez and Martha Beck used newspaper "lonely-hearts" ads to lure trusting women into deadly traps. Tonight, Kevin, Anthony, and Doug dissect how the couple's twisted love story escalated from fraud to at least three confirmed murders, why the media crowned them The Lonely Hearts Killers, and what finally brought the killers to the electric chair at Sing Sing Prison on March 8, 1951