Three Days of the Condor (1975)

Bookworm for the CIA suddenly finds himself the target of assassins at every turn. Desperately in need of someone to trust and hide him, he "drafts" a woman at random (a terrific Faye Dunaway) and uses her apartment as headquarters to figure out what the heck is happening. Simply flawless script that refuses to dumb it down for the audience. This is one of those stories to which you must give your attention or you're gonna miss something. At 25+ years old, it lacks the flash of a thriller churned out in the '90s, but I promise you won't miss it.

A-