Missing (1982)

 

When an idealistic American writer disappears during the Chilean coup d'état in September 1973, his wife and father try to find him.

From memory: Costa-Gavras, loyal to his devotion of making politically relevant and explosive thrillers, successfully aims to a larger audience with this more mainstream film two competent Hollywood stars; Jack Lemmon is especially good in performing a transition from a 'normal' average guy to becoming a engaged political activist.

Halliwell*: "A further link in the chain of political thrillers from this director; well-wrought and compulsive but finally disappointing in its mixture of fact and fiction." 

Maltin***1/2: "A carefully manipulated drama that works, because of Costa-Gavra's convincing direction and Lemmon's emphatic performance..."