This document summarizes the opening credits conventions for 4 crime drama television shows from 1977 to the present: The Professionals, Cagney And Lacey, The Bill, and NYC 22. It describes elements commonly featured in the opening credits such as characters, locations, vehicles, actions, and music styles to set the tone for each crime drama series. The shows represented are from the UK and USA and span from the 1970s to the modern day.