Barbara Stuart Mary Treen H. M. Wynant Rose Marie Notes In episode "The Jumper", an officer was depicted taking bribes. This prompted Richard J. Daley, the Mayor of Chicago at the time, to discourage motion picture and television location filming in Chicago for the rest of his administration (1955–1976). (He made an exception for the 1975 John Wayne film Brannigan, because of Daley's personal admiration for Wayne.) The Blues Brothers, released in 1980, marked the reversal of the policy under then-mayor Jane Byrne. Lee Marvin as Lt. Frank Ballinger carried two Colt Cobra snub nosed revolvers, the lightweight variant of Colt's "Detective's Special" revolver, which was popular with detectives at the time. Lt. Ballinger was the first T.V. police detective, of any note, to carry a backup revolver. The second Cobra revolver was carried in a more concealed position than the other. A novel was published in 1962, M Squad: The Chicago Cop Killer, by David Saunders. It was published by Belmont Books, New York. See also Police Squad! References External links 1957 American television series debuts 1960 American television series endings 1950s American crime drama television series 1960s American crime drama television series Black-and-white American television shows Fictional portrayals of the Chicago Police Department NBC original programming Television series by Universal Television Television shows set in Chicago