The Cold War spy film The Courier, which came out last year (I missed it totally), is available on Netflix. A “based on true events” tale that took place around the time of the Cuban Missile Crisis, it describes how a British businessman was persuaded by MI6 and the CIA to make contact with a Soviet scientist who appeared eager to share information about his country’s nuclear program with the West. As we now know, that cascade of events in 1962 came much closer to disaster than our leaders and the American public believed.

The film, directed by Dominic Cooke and written by Tom O’Connor (trailer), stars Benedict Cumberbatch as real-life businessman Grenville Wynne. The Soviet contact, Oleg Penkovsky, is played by a sad-eyed Merab Ninidze. The cast is great and the story gripping, even though it follows a well-trodden path. The stakes couldn’t have been higher. For both Wynne and Penkovsky, it was either take the risk or total annihilation.

The film was originally titled Ironbark, the Brits’ code name for Penkovsky, but the star turn belongs to Cumberbatch, the courier. The touches of Soviet perfidy seem right out of John le Carré. When the MI6 crowd starts talking about exfiltrating Penkovsky, it seemed like an impossible long-shot. (I wish they’d make a film about Oleg Gordievsky, another real-life Soviet spy, whose story was told in Ben Macintyre’s The Spy and the Traitor, which gives a hair-raising account of how difficult saving Soviet spies really was.

The Courier is a cautionary tale and a solid bit of filmmaking about a period people under 60 weren’t alive to experience.Rotten Tomatoes critics’ rating: 87%; audiences 95%