This document summarizes the opening credits conventions of four crime drama television shows from the UK and US between 1977-present. It describes the main visual elements shown in each opening such as characters, locations, and action scenes. It also provides information on the style of music used and relationships between characters. The shows are The Professionals (1977-1983, UK), Cagney & Lacey (1981-1988, USA), The Bill (1984-2010, UK), and NYC 22 (2012-present, USA).