Directed by Peter Yates and starring Steve McQueen, Bullitt follows a San Francisco police lieutenant assigned to protect a key witness who is later murdered. The film is widely known for its iconic car chase sequence through the streets of San Francisco. Blending procedural elements with restrained character focus, it became a defining entry in late 1960s American crime cinema.

Från IMDB:
A nonconformist San Francisco cop is determined to find the underworld kingpin who killed the witness under his protection.