Building the Great Cathedrals

Take a dazzling architectural journey inside those majestic marvels of Gothic architecture, the great cathedrals of Chartres, Beauvais and other European cities. Carved from 100 million pounds of stone, some cathedrals now teeter on the brink of catastrophic collapse. To save them, a team of engineers, architects, art historians, and computer scientists searches the naves, bays, and bell-towers for clues. NOVA investigates the architectural secrets that the cathedral builders used to erect their towering, glass-filled walls and reveals the hidden formulas drawn from the Bible that drove medieval builders ever upward.
Trailer
Recently Updated Shows

Jeopardy!
Jeopardy! is a classic game show -- with a twist. The answers are given first, and the contestants supply the questions. Three contestants, including the previous show's champion, compete in six categories and in three rounds (with each round's "answers" being worth more prize money).

The Great British Sewing Bee
Amateur sewers take on challenges as they compete to be named Britain's best home sewer.

Cops
COPS follows police officers, constables, and sheriff's deputies during patrols and various police activities by embedding camera crews with their units. The show's formula adheres to a classic cinéma vérité ethos. With no narration or scripted dialog, it depends entirely on the commentary of the officers and on the actions of the people with whom they come into contact.

Celebrity IOU
Celebrity IOU is a series where Hollywood A-listers express their deep gratitude to the individuals who have had a major impact on their lives by surprising them with big, heartwarming home renovations that bring everyone to tears.

The Boroughs
In a seemingly picturesque retirement community in the New Mexico desert, a group of unlikely heroes must band together to stop an otherworldly threat from stealing the one thing they don't have... time.