"Calling All Cars" was a pioneering old-time radio police drama in the United States, known for being one of the earliest of its genre. It aired from November 29, 1933, to September 8, 1939.

Here's a breakdown of key aspects of the series:

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  Format and Plot: The show dramatized actual cases handled by the Los Angeles Police Department. A typical episode would begin by outlining the facts of a crime, introduce individuals involved, follow with a dramatization culminating in an arrest, and conclude with the outcome of a trial. The overarching theme was "crime does not pay," emphasizing that a life of crime inevitably led to a grim end. It's widely considered a precursor to later police procedural dramas like "Dragnet."


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  Broadcast and Sponsorship: "Calling All Cars" was initially broadcast on the CBS West Coast network and the Mutual-Don Lee Network. It was sponsored by the Rio Grande Oil Co., primarily in California, Arizona, and Nevada, promoting their petroleum products. The program's popularity led to syndication, with other sponsors like Axton-Fisher Tobacco Co. (for Twenty Grand cigarettes), Gruen Watch Co., and Liebmann Breweries (for Rheingold Beer) bringing the show to other parts of the U.S.


• Personnel:


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  Host: Chief James E. Davis of the Los Angeles Police Department.


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  Narrator: Charles Frederick Lindsey, a professor of speech education.


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  Writers: William N. Robson (who also produced the program), Mel Williamson, and Sam Pierce.


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  Director: Robert Hixon.


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  Recurring Characters: Beyond the host and narrator, the only other regular on-air person was real-life LAPD dispatcher Jessie Rosenquist, whose voice and catchphrase "that is all" became a trademark of the show. Most other on-air roles were uncredited.


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  Significance: "Calling All Cars" was a significant development in radio programming, establishing many elements that would become staples of the police procedural genre. It offered listeners gritty details of criminal activities in a "ripped from the headlines" style, often featuring dramatizations of notable cases of the era.

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