Often times civilians suffer from waging a war – in this episode, experts track down three weapons that were used to recklessly attack civilian populations. With no regard for civilian casualties, the trebuchet hurls heavy stones against solid castle walls. Deploying biological weapons is a chance to conquer a fortress without destroying it. Designed to put an end to World War II, the atomic bomb embodies fear and terror to this day. Now, a cyber war could be most devastating, affecting everyone's reality.