Nolan’s masterful musing on the morality of science is both challenging and compelling

Director: Christopher Nolan

Cast: Cillian Murphy (J Robert Oppenheimer), Emily Blunt (Kitty Oppenheimer), Matt Damon (General Leslie Groves), Robert Downey Jnr (Lewis Strauss), Florence Pugh (Jean Tatlock), Josh Hartnett (Ernest Lawrence), Casey Affleck (Colonel Boris Pash), Rami Malek (David Hill), Kenneth Branagh (Niels Bohr), Benny Safdie (Edward Teller), Dane DeHaan (General Kenneth Nichols), Jason Clarke (Roger Robb), David Krumholtz (Isidor Issac Rabi), Tom Conti (Albert Einstein), Alden Ehrenreich (Strauss’ aide), Gary Oldman (President Truman), Jefferson Hall (Haakon Chevalier)

“I am become Death, the destroyer of worlds”. These words from The Baghavad Gita are synonymous with J Robert Oppenheimer, director of the Manhattan Project as he witnessed the destructive force of his creation, the atomic bomb. Fittingly, Nolan’s fascinating and ambitious film opens with a reference to Oppenheimer as Prometheus: the man punished for all time for stealing fire from the Gods. Oppenheimer uses everything from thriller to courtroom drama, to explore the moral responsibilities of science: if we can do a thing, does it follow that we must?

J Robert Oppenheimer (Cillian Murphy) is a Renaissance man and leading theoretical physicist who dabbled more than a little in left-wing politics. The woman he loves, Jean Tatlock (Florence Pugh), is a die-hard communist, the woman he marries Kitty (Emily Blunt) is a former party member, his closest friends are all members. Associations like these will later haunt him after he is approached by General Leslie Groves (Matt Damon) to use his organisational skills, political savvy and charisma to run the WW2 nuclear programme where maverick scientists work hand-in-hand with the army. Despite his position, Oppenheimer remains untrusted by many. In the aftermath of the war, these suspicions will be used by his opponents, among them Lewis Strauss (Robert Downey Jnr) ex-head of the Atomic Energy Committee, to bring about his downfall as Oppenheimer preaches disarmament.

Much like Dunkirk, Oppenheimer is told in two timelines, intersecting with scenes replayed from different perspectives in subtly different ways. In “Fission” we see Oppenheimer, effectively on trial in 1954 for his security clearance, recount his life story, chronological flashbacks taking us through the development of the bomb. In “Fusion”, shot in gorgeous black and white, we follow the 1959 senate hearings to confirm Strauss in a cabinet post, and see his reminiscences of Oppenheimer’s post-war struggles to control the monster he has unleashed.

Oppenheimer is a brilliantly made, cinematically adventurous film: you would, of course, expect nothing less from a distinctive talent like Nolan. Brilliantly intercutting multiple timelines, it’s a film that is as much an experience as a story. This is a behemoth, filled with moments of flair and breath-taking use of sound and vision to affect mood. In particular, the film’s oppressive sound design bears down on the viewer like the pressure of the bomb itself. This means moments when we are released from its grip carry real impact. As Oppenheimer – already plagued with doubt – triumphantly announces the successful use of the bomb, the war-like celebratory pounding of scientists’ feet disappears from the soundtrack leaving Oppenheimer’s words echoing impotently around the room.

The pounding score and epic, sweeping camerawork (even more striking, since so much of the film takes place in small rooms filled with conversation) help Nolan to build up Oppenheimer’s mythic status and simultaneously strip him bare. Literally so at one point as, when questioned on his sex life in his hearing, Oppenheimer is seen naked in the room (as exposed as he must be feeling) answering questions with a naked Jean Tatlock astride him, staring into his wife’s eyes.

Oppenheimer labours, with the best intentions, to create a weapon before the Nazis. In its middle act, Nolan’s film focuses on the propulsive excitement of creation. The thrill of obstacles being overcome and solutions being found. The joy of a diverse team coming together for a single goal. We find ourselves longing for problems to be overcome, swept up in the desire for the endgame, as anxious as the scientists when it looks like rain will prevent the vital first Trinity test of the bomb.

Oppenheimer feels the same. Powerfully, intelligently and magnetically played by Cillian Murphy, this is a man who is a host of flaws crammed with impossible genius. A charismatic room leader, who is awkward in personal interactions. A charmer who rudely fails to remember his brother’s girlfriend’s name at a party. An inspiring leader who alienates people with ease. Murphy captures every inch of Oppenheimer’s staggering intellect and delight in intellectual problems, just as he also embodies the man’s arrogance and crushing self-belief.

So, it’s as crushing to him as it is terrifying to us, when the bomb explodes and the realisation hits us. Nolan’s sensory experience of a film fades down to silence as Nolan lets the camera float across the all-consuming fire of the silent explosion (the noise only comes when the shockwave hits) and suddenly the chilling implication of this terrible weapon becomes clear. This is a device that will kill millions. Oppenheimer knows it: he slowly shrivels into haunted guilt, Murphy seeming to shrink into himself as he finally understands what he has done.

Images of nuclear destruction both obvious (ashen bodies and nuclear flashes) and subtle (the out-of-focus vibration of background around Oppenheimer, as if sensing an approach shockwave) will haunt him and us for the rest of the movie. While many scientists – foremost among them Benny Safdie’s bull-headed Edward Teller and Josh Hartnett’s WASPish but decent Ernest Lawrence – feel little guilt. But Oppenheimer, and we, can no longer avoid questions of moral responsibility raised by those such as Niels Bohr (a quietly effective Kenneth Branagh).

Are there some discoveries better not made? Because once the genie is out of the bottle, it cannot be stuffed back in again. In this new world every world power must always have more. More bombs, bigger bombs, better bombs. And it explains why, like Prometheus, Oppenheimer must be punished. The tool of his punishment being his communist sympathies, embodied in his yearning attraction to Jean Tatlock (an under-used Florence Pugh). Nolan’s film is very strong on the terrifying paranoia of the secret state, where every word or association can be collected into a terrible portfolio of witnesses you cannot question, evidence you cannot see, testimony you cannot hear.

“Why don’t you fight” cries his wife Kitty, played with a dynamic, intelligent forcefulness by Emily Blunt. I could have done with a third act built more around Blunt’s starkly honest betrayal of a woman ill-suited to being a wife and mother, trapped in a world where that is all women can achieve (and which also trimmed a few witnesses from Oppenheimer’s trial). Why doesn’t Oppenheimer fight? Nolan has his theories, carefully seeded and confidently revealed.

Oppenheimer’s post-war clashes cover much of “Fusion”, anchored by a superbly under-playing Robert Downey Jnr (his finest work since Chaplin) as the outwardly avuncular, but inwardly insecure and bitter Strauss, who sees Oppenheimer as the embodiment of all the elitists who turned their noses up at him (no matter that Oppenheimer himself is an outsider, in a world of science run by WASPish types like Lawrence). Nolan’s film explores how morality is forgotten in an environment so rife with paranoia that the slightest expression of doubt is seen as treason.

Nolan’s film needs its vast runtime to keep as many balls in the air as it tries to. It’s probably a few too many balls. I would have loved more on Oppenheimer’s outsider status, as a Jew in American science (its not mentioned that the J stands for Julius, despite his claims it stands for nothing). Similarly, I would have welcomed more time to explore Oppenheimer’s complicated emotional life, in particular the fascinatingly complex relationship of some love, a fair amount of mutual respect and a large measure of mutual convenience with his wife Kitty.

But the film’s chilling musing on the horrors science can accidentally unleash while focused on progress is superbly explored and leaves a lasting impact. It’s a feeling that continues to be sharply relevant while we struggle with the implications of AI. Was there a need for the bomb? Perhaps there was. Were we ready for the bomb? No. And it is the failure of anyone, including Oppenheimer, to even consider this until it was too late that is the coldest warning in Nolan’s epic film.