This groundbreaking and award-winning NBC crime drama provided a very realistic view into the lives of the dedicated cops and detectives of an urban police station. From January 1981 to August 1986, the show ran on Thursdays at 10/9 Central, with occasional repeats on Saturdays at 10/9 Central. From August 1986 to August 1987 first-run episodes aired Tuesdays at 10/9 Central.