Three Days of the Condor
His CIA code name is Condor. In the next seventy-two hours almost everyone he trusts will try to kill him.
9/24/1975
Imdb: tt0073802
Tmdb: 11963
Popularity: 18.538
Vote: 7.288/10 (1140)

A bookish CIA researcher finds all his co-workers dead, and must outwit those responsible until he figures out who he can really trust.