Overview
The Chairman (or alternatively The Most Dangerous Man in the World) is a 1969 spy film starring Gregory Peck. It was directed by J. Lee Thompson. The screenplay was by Ben Maddow based on a novel by Jay Richard Kennedy.
Plot
A Western agent is sent to Communist China in order to retrieve an important agricultural enzyme. What he does not know is that there is a bomb implanted in his head; the forces behind his mission will detonate it if he fails to carry out the assignment.
Nobel Prize–winning university professor Dr. John Hathaway's mission begins with Lt. General Shelby's request at the U.S. embassy in London that he travel to China to visit Soong Li, a former professor of Hathaway's who has reportedly developed an enzyme that would permit crops to grow in any kind of climate. The hesitant Hathaway is further urged to go by a phone call from the President of the United States. Hathaway is concerned about the situation, as is a close female friend he knows named Kay in London.
A transmitter is implanted in Hathaway's skull as a tracking device. He is not informed that the device also includes an explosive element in case of emergency that can be triggered by the Americans if necessary. Neither the U.S. nor the Soviet Union wants the enzyme to remain exclusively in Chinese hands.
From Wikipedia (CC BY-SA 4.0).