Call Northside 777 is a 1948 reality-based newspaper American drama film directed by Henry Hathaway. The film parallels the true story of a Chicago reporter who proved that a man jailed for murder was wrongly convicted 11 years before. James Stewart stars as the persistent journalist and Richard Conte plays the imprisoned Frank Wiecek. Wiecek is based on Joseph Majczek, who was wrongly convicted of the murder of a Chicago policeman in 1932, one of the worst years of organized crime during Prohibition.

In Chicago in 1932, during Prohibition, a policeman is murdered inside a speakeasy. Frank Wiecek and another man are quickly arrested, and, in November 1933, are each convicted and sentenced to serve 99 years imprisonment for the killing.

Eleven years later, Wiecek's mother puts a classified ad in the Chicago Times offering a $5,000 reward for information about the true killers of the police officer. This leads the paper's city editor, Brian Kelly, to assign reporter P. J. McNeal to look more closely into the case. McNeal is skeptical at first, believing Wiecek to be guilty. But he starts to change his mind, and meets increased resistance from the police and the state's attorney's office, who are unwilling to be proved wrong. This is quickly followed by political pressure from the state capital, where politicians are anxious to end a story that might prove embarrassing to the administration.

Eventually, Wiecek is proved innocent by, among other things, the enlarging of a photograph showing the date on a newspaper that proves that a key witness statement was false. (In actuality, innocence was determined not as claimed in the film but when it was found out that the prosecution had suppressed the fact that the main witness had initially declared that she could not identify the two men involved in the police shooting.^[2])

It was reported on January 24, 1947, that, according to the studio, the picture would be filmed in the documentary manner. Fox had obtained the necessary legal clearances from the persons involved in the story and had dispatched Otto Lang, producer, and Leonard Hoffman, writer, to Chicago to gather material for the film. Eventually, Quentin Reynolds and Jay Dratler joined Hoffman in writing the script.

Casting the film proved complex. According to a March 7 report in The New York Times, Twentieth Century-Fox had named Henry Fonda to play the newspaper reporter in Call Northside 777, which would precede Chicken Every Sunday and Lone Star Preacher on Fonda's schedule. However, after a month, another report pointed out that Fox had named Fonda for a leading role in the screen adaptation of Elizabeth Janeway's novel, Daisy Kenyon, which necessitated Fonda's replacement in Call Northside 777. Two months later, another report said that Twentieth Century-Fox was "negotiating for the services of James Stewart for the leading role in Call Northside 777." Lloyd Nolan was originally named to play the role of Brian Kelly, but Lee J. Cobb replaced him in the end. Leopoldine Konstantin was originally scheduled to play the wrongly convicted man's mother, but in the end the role went to Kasia Orzazewski.

This was the first Hollywood feature film to be shot on location in Chicago.^{[citation needed]} Views of the Merchandise Mart as well as Holy Trinity Polish Mission can be seen throughout the film. A scene filmed at the Stateville Penitentiary shows the interior of the so-called "Roundhouse," a "panopticon" cell block built according to a design originated by English philosopher Jeremy Bentham.^[3]

The film opened at the New Theatre in Baltimore in the week ending 18 February 1948 and opened at the Roxy theatre in New York City on 18 February.^[4]

Call Northside 777 was advertised by the Valerie Theatre in Inverness, Florida. The manager picked out random numbers from the phone book. If the party called answered by saying "Are you calling Northside 777," free tickets to see the show were given.

The film is recognized by American Film Institute in these lists:

• 2001: AFI's 100 Years...100 Thrills – Nominated^[8]

For an episode of CBS Radio's Hollywood Sound Stage, broadcast December 27, 1951, Harry Kronman adapted and directed a condensed 30-minute version of the film, casting Dana Andrews and Thomas Gomez in the leads. Tony Barrett, Bob Sweeney, Betty Lou Gerson, and Frank Nelson played supporting roles.

The April 17, 1951, audition episode of the radio program Defense Attorney (then titled Defense Rests) starring Mercedes McCambridge was based on the same plot, with some modifications.

Indian Hindi film Post Box 999 (1958) directed by Ravindra Dave was inspired by this film.^[9]