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

>>16
Well according to youtube comments Dangerous Knowledge is shitty and false.

"The film might have some credibility if Cantor had actually committed suicide, which he didn't.

Even so, this is sensationalist hogwash of the lowest order. The BBC should be ashamed to have had any part in the production such nonsense.

- JBW"