Documentary Recommendations

I got plenty of free time now that exams are over and I wanted to spend a whole week just marathoning various documentary series and films.
Looking for recommendations it can span any topic as long as it's interesting.
Currently downloading Carl Sagan's Cosmos for a rewatch

>>1
Check out "Master of the Universe", a two part documentary on Stephen Hawking. It's one of those BBC4 documentaries, which are pretty awesome. Some other cool ones from BBC4 are Absolute Zero, showing the advances we have come to reach absolute zero, and Dangerous Knowledge, a piece on mathematics examining Georg Cantor, Ludwig Boltzmann, Kurt Gödel and Alan Turing.

Nova's Elegant Universe is also worth a watch.