This episode of *The Butterfly King*, an interview podcast, investigates the death of King Boris III of Bulgaria in 1943, exploring the possibility of British involvement. The podcast follows Becky Milligan's investigation, interviewing Princess Maria Luisa and King Simeon, alongside historians and experts. The initial theory, fueled by Goebbels' diary and archival research, suggests British agents used Asian snake venom. However, the royals and historians refute this, revealing King Boris was secretly negotiating with the Allies. The podcast concludes with Milligan's discovery of a Japanese telegram implicating the Soviets in a plot against the King, shifting the focus of the investigation.
