Segments on King Ferdinand II of Aragon and Queen Juana of Spain, who was driven mad by love; the development and use of the atomic bomb; Hiroshima; surgical implants that relieve arthritis pain; video-game therapy; early brain scanning; hypnotism with treatment. A feature on construction feats includes Washington Roebling and the origin of the Brooklyn Bridge and the Great Wall of China. Asmat people and unique totems and carvings; fingernail artist; ritual pilgrimage with head shaving in India; the Pony Express.