In New York social circles, he was known as the “Jewish James Bond”: a refugee from Nazi Germany whose gratitude to his American hosts was such that he volunteered to join the US army and became the CIA’s first station chief in Berlin as a mere twentysomething, filing early warnings about Soviet activity that have been credited with ringing in the cold war.

Like 007, Peter Sichel also appreciated a fine tipple, and after leaving the US foreign intelligence service it was he who briefly turned a sweet German white, Blue Nun, into one of the best-selling wines in the world.

A film released in UK cinemas a year after his death aged 102, however, shows Sichel as something more akin to a Jewish Jason Bourne: a former agent who grew increasingly disillusioned with CIA meddling and turned a trenchant critic from beyond his grave of US foreign policy – especially in Iran.

In the documentary The Last Spy by the American-German filmmaker Katharina Otto-Bernstein, Sichel openly criticises US governments of the past for acting against the advice of its intelligence community to depose democratically elected leaders in Guatemala, Indonesia, Congo and especially Iran.