The Courier details a fascinating tale of deceit. A recap of real events, the film follows Greville Wynne (Benedict Cumberbatch) as he’s recruited into one of the most significant international conflicts in history. Tasked with helping put an end to the Cuban Missile Crisis, he forms a partnership with Soviet officer Oleg Penkovsky (Merab Ninidze) in an effort to provide crucial intelligence needed to prevent a nuclear confrontation. Cumberbatch is a calm force throughout. While seemingly accurate to Wynne’s disposition, it makes the addition of Rachel Brosnahan and Jessie Buckley all the more welcome. Brosnahan plays CIA agent Emily Donovan, and Buckley plays Wynne’s wife, Sheila. Both work to add some compelling and familiar relationship dynamics to the otherwise distant exchanges between Wynne and Penkovsky in drab locales. The heightened level of emotion they provide propels the story and Cumberbatch forward, keeping viewers engaged as they approach a climactic ending.