FRONTLINE: North Korea's Deadly Dictator Earlier this year, Kim Jong-un's half brother, Kim Jong-nam, was ambushed in a Malaysian airport by two women bearing a lethal chemical weapon 10 times more powerful than sarin. He died en route to the hospital. Who planned the murder of Kim Jong-un's half brother, and what does it reveal about the leader and his regime?

As nuclear tensions between President Donald Trump and North Korean leader Kim Jong-un escalate, producer Jane McMullen examines claims the North Korean leader and his intelligence services ordered the assassination on Kim Jong Nam, and sheds light on his broader intentions - and nuclear capabilities.

Drawing on interviews with a leading North Korean defector, diplomats, experts, Kim Jong-nam's school friends and even a former North Korean secret agent, the documentary is a rare glimpse inside the secretive country - and an eye-opening look at both how King Jong-un thinks, and how he's trying to ensure his regime's survival and perpetuate his own power.