1) The courier
The true story of a British businessman unwittingly recruited into one of the greatest international conflicts in history. Forming an unlikely partnership with a Soviet officer hoping to prevent a nuclear confrontation, the two men work together to provide the crucial intelligence used to defuse the Cuban Missile Crisis.
Endeavour and his colleagues are entering a new decade and era of change. Opening on New Year's Eve 1969, normal order has been resumed and the team reunited at Castle Gate CID, with Chief Superintendent Bright back in charge. However, the events of the past year have left their mark. Old friendships will be challenged, and new relationships will blossom.