The first in a series of ten programs this episode illustrates the development of Western knowledge. The inquisitive and logical attitude of teh classical Greeks is at the foundation of Western thought with its continuing exploration of new ideas.

The bitter conflict between reason and faith that followed the Crusaders' invasion of Spain in the 11th century is studied. The time when Christian Europe recaptured from the Arabs a treasure of Greek, Roman, and Arab scientific knowledge.

The astonishing changes that developed out of new discoveries of perspective geometry, new architectural techniques, and the ability to map the world and cros oceans. Also explores how the knowledge led to a new individualism.

The medieval world which relied largely on memorized knowledge and the spoken word was transformed by Gutenberg's discovery of the printing press. This new knowledge is examined and connections are drawn to subsequent revolutions in Western thought.

This program explains how from 1550 and forward science began to undermine the Church-sanctioned Aristotelian doctrine of the universe, in which the Sun and all the planets revolved around the Earth. In its place, was established the model to which we adhere today of a clockwork universe, governed by discoverable laws of math and physics.

This program examines the reasons for and the effects of the Industrial Revolution. Shows how growing wealth, coupled with innovations in business and credit, created a new industrial society.

This Program looks at the rise of modern medicine and its surprising relationship with the invention of statistics, which doctors used to validate the efficacy of diagnoses and treatments. In particular it examines how bacteriology put the patient on a microscope slide and brought about a world in which even healthy human beings were reduced to statistics.

This program examines the mid-nineteenth century emergence of the theory of evolution and its affects. It reveals how Darwin's writings undermined the concept of an orderly, unchanging universe and the belief in the biblical theory of creation.

Examines the evolution of physics though time. As scientists in 1800 investigated the new electric battery, their common sense Newtonian world began to fall apart. A new science slowly evolved from the pioneers from Faraday to Einstein.

The final program reviews the entire series, recalling the many systems of belief which have been discarded as the discovery of new knowledge rendered them apparently invalid. The series closed by posing a philosphical question: if each truth is valid in its time, then is knowledge itself only what we make it?