In the second episode, Professor Iain Stewart discovers how flowers have transformed our planet. He journeys to the remote islands of the South Pacific to track down the earliest flowers. In the deserts of Africa and rainforests of Vietnam, he sees how they brought brilliant colour to the most barren landscapes and sculpted the earth itself. And he learns how they drove the evolution of all animals - kick-starting our human story.

Can love change the world? Morgan Freeman is on a global quest to understand how this primal force binds us together as a species. From orphanages to battlefields, from arranged marriages to life on the streets, Freeman sees how love can be found in unexpected places and how this force inspires us all.

In the last episode of the series, Freeman examines different faiths' views on miracles, meeting a man who survived falling 47 storeys and a cancer patient who believes his illness can be cured by prayer.

Placebos come in all shapes and sizes, but they contain no active ingredient. They are the miracle pills that shouldn't really work at all. Now they are being shown to help treat pain, depression and even alleviate some of the symptoms of Parkinson's disease. It seems they're not acting alone. The placebo effect is intertwined with how is did the healthcare. Explores why they work, and how we could all benefit from the hidden power of the placebo.

Can we find a way to distribute power so that everyone has their say? A U.S. president explains the challenges of making decisions that affect hundreds of millions of lives, and Freeman learns about an African woman who has created a society without men. He explores how the rise of the internet may fundamentally change how democracy works.

The world couldn't keep its eyes off two athletes at the 1994 Winter Games in Lillehammer - Nancy Kerrigan, the elegant brunette and Tonya Harding, the feisty blonde engulfed in scandal. Just weeks before the Olympics on January 6, 1994 at the U.S. Figure Skating Championships, Kerrigan was stunningly clubbed on the right knee by an unknown assailant and left wailing, 'Why, why, why?'
As the bizarre 'why' mystery unraveled, it was revealed that Harding's ex-husband, Jeff Gillooly, had plotted the attack with his misfit friends to literally eliminate Kerrigan from the competition. Now two decades later, The Price of Gold takes a fresh look at the worldwide spectacle that elevated the popularity of professional figure skating and has Harding still facing questions over what she knew when she knew it.