These skyscrapers of stone dominated skylines for nearly a thousand years. Now, a team of scholars and builders investigates how they we went up, and why some of the tallest fell down. Embedded in stone and stained glass, they uncover a hidden mathematical code — ripped from pages of the Bible — that was used as a blueprint to build the great Gothic Cathedrals.
| Actor | Role |
|---|---|
 Féodor AtkineSelf - Narrator (voice) | Self - Narrator (voice) |
| JJoan R. BranhamSelf | Self |
| FFrank HelmholzSelf | Self |
| SStefaan Van LiefferingeSelf | Self |
| TThibaut DesjardinsSelf | Self |
| JJacqueline JungSelf | Self |
| AAndrew TallonSelf | Self |