Mitchel P. Roth, a scholar of weaponized mail history, and Mahmut Cengiz, an expert in postal bombs, dive deep into the dark world of letter bombs. They recount gripping stories from the 18th century to modern terror acts, unveiling how these deadly devices evolved. The duo discusses the motivations behind infamous incidents like the suffragettes' violent tactics and the 1919 anarchist mail bomb plot. They also explore the chilling connections between bombers and serial killers, highlighting the ongoing relevance of this deadly phenomenon.