In the fourth episode, Morgan Freeman examines how different faiths see the creation of the world, taking him on a journey to the Vatican, Cairo and the jungles of Guatemala.

Dr Francesca Stavrakopoulou asks whether the ancient Israelites believed in one God as the Bible claims. She puts the Bible text under the microscope, examining what the original Hebrew said, and explores archaeological sites in Syria and the Sinai which are shedding new light on the beliefs of the people of the Bible. Was the God of Abraham unique? Were the ancient Israelites polytheists? And is it all possible that God had another half?

Sodom and Gomorrah, a tale of two cities incinerated by a hail of fire and brimstone. Is this a fantastic fable, or could it be a near apocalyptic disaster from space? In this episode, we will check into the mysteries relating to the destruction of both cities. Were they astronomical events?
Newly discovered evidence might hold the secrets to one of the Bible's greatest mysteries.

In the fourth part of the series, Diarmaid MacCulloch makes sense of the Reformation, and of how a faith based on obedience and authority gave birth to one based on individual conscience. He shows how Martin Luther wrote hymns to teach people the message of the Bible, and how a tasty sausage became the rallying cry for Swiss Reformer Ulrich Zwingli to tear down statues of saints, allow married clergy and deny that communion bread and wine were the body and blood of Christ.

The Codex Gigas, or Devil's Bible, is the world's largest and most enigmatic medieval manuscript, said to be crafted from 160 donkey skins and weighing a staggering 165 pounds. Its chilling full-page portrait of the Devil, believed to be the result of a monk's desperate pact with dark forces, is just the beginning of its mysteries. Written in the Kingdom of Bohemia, this legendary text blends biblical scripture with forbidden demonic spells, making it both sacred and cursed.
Filled with mystical medical formulas and cryptic incantations, the Codex Gigas holds mysteries that have fascinated historians for centuries. The haunting contrast between a Heavenly City and the devil's image adds to its mystique. This documentary dives deep into one of history's most mysterious artifacts, uncovering secrets that have captivated the world for generations.

The Queen of Sheba - an exotic and mysterious woman of power - is immortalised in the world's great religious works, among them the Hebrew Bible and the Muslim Koran. She also appears in Turkish and Persian painting, in Kabbalistic treatises, and in medieval Christian mystical works, where she is viewed as the embodiment of Divine Wisdom and a foreteller of the cult of the Holy Cross. In Africa and Arabia her tale is still told to this day and, indeed, her tale has been told and retold in many lands for nearly 3,000 years.