Can someone help me find a Mathematical documentary that aired on British television within the past 10 years about Leibniz? I have been searching for a documentary that aired on British television between around 2006 and 2012 which was centred around the German Mathematician, Gottfried Leibniz. All that I can remember about the show is that it discussed his dispute with Sir Isaac Newton regarding the invention of calculus, as well as a problem regarding a Brachistochrone curve. It also featured one of Leibniz's living relatives who appeared at the end of the show who was working in something media related. (obscure details, I know...)
I have eliminated two documentaries about Mathematics from my list including:
The Story of Maths (2008) - http://en.wikipedia.org/wiki/The_Story_of_Maths
The Birth of Calculus (1986) - https://www.youtube.com/watch?v=ObPg3ki9GOI
I have tried doing extensive searches on Google and various websites such as the BBC to no avail. Can anyone remember what television programme I am referring to?
Thanks.

I think the BBC documentary you are talking about is The Birth of Calculus (1986)
