Everything you wanted to know, but were afraid to ask.
The new season premieres Friday at 10ET/11PT. Watch full episodes now.
The new season premieres Tuesday, November 4 at 9/8c. Catch up now.
From Da Vinci's android to a mechanical monk, get the story behind these early mechanical wonders.
Get a sneak peek now and tune in Tuesday, Nov. 4 at 10/9c for the series premiere.