As exposed in the film, these women took the world by storm, becoming the iconic faces of '1990s culture until shifting perceptions and a controversial remark shook things up. The third episode delves into the rise of the supermodels like Naomi Campbell, Cindy Crawford, Linda Evangelista and Christy Turlington and their impact on the fashion industry. It also explores the commercialization of fashion, the transition of models into acting, and the globalization of the fashion business. However, the episode takes a darker turn with the tragic assassination of fashion designer Gianni Versace, signaling a shift in the industry's dynamics.

In the last episode, Al-Khalili turns detective, hunting for clues that show how the scientific revolution that took place in the 16th and 17th centuries in Europe had its roots in the earlier world of medieval Islam. He travels across Iran, Syria and Egypt to discover the huge astronomical advances made by Islamic scholars through their obsession with accurate measurement and coherent and rigorous mathematics.He then visits Italy to see how those Islamic ideas permeated into the west and ultimately helped shape the works of the great European astronomer Copernicus, and investigates why science in the Islamic world appeared to go into decline after the 16th and 17th centuries, only for it to re-emerge in the present day. Al-Khalili ends his journey in the Royan Institute in the Iranian capital Tehran, looking at how science is now regarded in the Islamic world

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.