The Flow of Time, a captivating documentary exploring the nature of time using Einstein's general theory of relativity as an anchor point.
The film discusses the implications of space-time, a reassuring idea that says everything that has existed still does on a fourth-dimensional axis. The dark implication space-time presents is that the future already exists too and actions you perceive to be your own free will have already happened - in the future. The only other alternative is quantum mechanics.
This was the first documentary to feature Jim Al-Khalili.