Espion, lève-toi (1982)

Ventura plays a retired agent living a peaceful life with a younger, loving German woman, who's teaching in France, when he is called into active service again - very much against his will. When he finally starts suspecting all people around him - minus those who fall dead after he makes the first moves into knowledge… - it will be too late. Too late to avoid discovering the unthinkable truth, and too late to get back to his peaceful retirement. imdb