Topaz

Alfred Hitchcock directs John Forsythe as an American CIA agent who learns of Cuban missiles through a French operative he hires to follow up on some rumors, and a NATO spy named Topaz who leaks secrets to the Soviet Union. It seems there's a traitor in the entourage of French president De Gaulle, strange doings taking place in Cuba, and a mysterious, nefarious band of spies known as the Topaz Group readying itself for a big event. (official distributor synopsis)