Nolan told the Guardian that there are “very strong parallels” between Oppenheimer and the AI community. (I should note here that, in real life, Oppenheimer consulted a different physicist, Arthur Compton, about his apocalyptic concerns.) There are obvious parallels with the modern day and artificial intelligence, whose creators are now calling for development of the technology to be tamed. The excellent biography on which the film is based, American Prometheus by Kai Bird and Martin J Sherwin, goes into great detail about Oppenheimer’s regret over, and attempts to rein in, the monster he created. It is a devastating moment and is the emotive payload of the film, followed by a montage featuring rows of nuclear missiles, vapour trails of projectiles puncturing the sky, the planet being consumed by fire – and Oppenheimer’s stricken face. Einstein, played by Tom Conti, says: “What of it?” To which Oppenheimer replies: “I believe we did.” The film ends with a conversation between the godfather of the nuclear bomb and Albert Einstein in 1947, in which Oppenheimer (Cillian Murphy) reminds the German-born theoretical physicist that he had once approached him about fears that his project would “destroy the entire world”.

Photograph: Melinda Sue Gordon/Universal Pictures A devastating moment … Tom Conti as Albert Einstein and Cillian Murphy as J Robert Oppenheimer.

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