It's late Thursday night at the local paper and a savvy city editor, a world-weary but upright writer, and a beleagured copy boy prepare to put the next day's paper to bed. Suddenly two stories come over the wire. In the first, a young girl has gotten lost in the city's storm drains, and her life is endangered when a terrible storm erupts and the sewers begin to fill with runoff. In the second, the grandson of the writer is among a team of missing Air Force pilots who were attempting to set a record flying from Hawaii to Washington, DC. This suspenseful, newsroom drama chronicles the ways in which these situations affect the workers as they try to get the paper out on time. ~ Sandra Brennan, All Movie Guide
-30- (released as Deadline Midnight in the UK) is a 1959 movie starring William Conrad and Jack Webb as the editor and publisher, respectively, of a fictional Los Angeles evening newspaper. As the shift of a typical day starts, in which they don't know what will happen, the newspaper is created before our eyes as different stories are discovered and reported.
"-30-" has been used to signify "the end" or "over and out" since the Civil War when telegraphers tapped "XXX" to end transmissions. "XXX" is the Roman numeral for 30. How and when "XXX" transformed into "-30-" in modern printing usage is unclear. This notation is still used to indicate the end of a press release and can frequently be found in formal corporate documents posted on websites and delivered electronically or via print.