The spy just happens to be being played by the most gifted comic actor who ever lived. You've seen the bit where Buster Keaton bonks a railway sleeper out of the way with another railway sleeper watch the whole thing, though, and you'll see it's a proto-spy film. Robert Pattinson wears some lovely suits too.

Whether it makes sense and what actually happens in the end is the wrong question to ask it's really a mega-budget attempt to invert blockbuster cinema at large. When Protagonist (yep) is recruited by a shadowy organisation which has the technology to manipulate time, he's tasked with taking out the villainous Sator who wants to save the world by turning it all backwards and destroying it.

But with a little bit of distance, it all feels less like Nolan's audition for a Bond film – though there were definitely nods and winks here and there – and more like a genre-bending attempt to launch a sensation straight into your brain. (It was a deliberate artistic choice! Actually!!) Tenet was the first Christopher Nolan thinky-thriller to really split opinion.

The release schedule knackered by the pandemic and everyone's ears were knackered from straining to hear what anyone's saying through the haze of noise and rumbling which permeates the whole thing.

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