The Untouchables is a 1987 American crime film directed by Brian De Palma, produced by Art Linson, and written by David Mamet. The film is loosely based on the book of the same name (1957) and the real-life events it was based on, but most of its plot is fictionalized. The film stars Kevin Costner, Charles Martin Smith, Andy García, Robert De Niro (third collaboration between De Palma and De Niro, following 1968's Greetings and 1970's Hi, Mom!), and Sean Connery, and follows Eliot Ness (Costner) as he forms the Untouchables team to bring Al Capone (De Niro) to justice during Prohibition. The Grammy Award–nominated score was composed by Ennio Morricone and features period music by Duke Ellington.

The Untouchables premiered on June 2, 1987, in New York City, and went into general release on June 3, 1987, in the United States. The film grossed $106.2 million worldwide and received generally positive reviews from critics. It was nominated for four Academy Awards; Connery won the Academy Award for Best Supporting Actor.

DETAILED PLOT

In 1930, during Prohibition, the notorious gangland kingpin Al Capone supplies illegal liquor and nearly controls all of Chicago. Bureau of Prohibition agent Eliot Ness has been tasked with halting Capone's activities, but his first attempt at a liquor raid fails due to corrupt policemen alerting Capone. He then encounters veteran Irish-American officer Jimmy Malone, who opposes the rampant corruption and offers to help Ness, suggesting they find a man from the police academy who has not yet come under Capone's influence and still believes in the idealistic aspects of law enforcement. They recruit Italian-American trainee George Stone (birth name Giuseppe Petri) for his superior marksmanship and integrity. Joined by accountant Oscar Wallace, assigned to Ness from Washington, D.C., they successfully raid a Capone liquor warehouse and start gaining positive publicity, with the press dubbing them "The Untouchables". Capone later kills the warehouse manager with a baseball bat to warn his other subordinates.

Discovering that Capone has not filed an income tax return for four years, Wallace suggests trying to build a tax evasion case against him (as Capone's network keeps him well-insulated from his other crimes). A crooked alderman offers Ness a bribe to drop his investigation, but Ness refuses. After Capone's enforcer Frank Nitti threatens to kill Ness's wife Catherine and their daughter, Ness immediately moves them to a safe house. In a subsequent raid on the Canadian border, Ness and his team intercept an incoming liquor shipment, killing several gangsters and capturing a Capone bookkeeper named George, whom they eventually persuade to testify against his boss. Back in Chicago, Nitti, dressed as a policeman, murders Wallace and George in a police station and leaves a taunting message for Ness. Ness confronts Capone at the Lexington Hotel after the murders, but Malone intervenes, urging Ness to focus on persuading the district attorney not to dismiss the charges against Capone.

Realizing that police chief Mike Dorsett sold out Wallace and George, Malone forces Dorsett to reveal where Capone's accountant, Walter Payne, is hiding. That evening, one of Capone's men breaks into Malone's apartment; Malone chases him out with a shotgun, but Nitti ambushes him with a Tommy gun. Shortly afterwards, Ness and Stone arrive to find Malone mortally wounded; before he dies, Malone shows them which train Payne will take out of town. As the duo await Payne's arrival at Union Station, Ness sees a young mother with two suitcases and a child in a carriage laboriously climbing the lobby steps. Ness ultimately decides to assist her, but the gangsters guarding Payne appear as Ness and the woman reach the top of the stairs, and a bloody shootout occurs. Though outnumbered, Ness and Stone manage to capture Payne alive and kill all his escorts, keeping both the mother and child unharmed.

Later, when Payne testifies at Capone's trial, Ness observes that Capone appears strangely calm, and that Nitti is wearing a gun in the courtroom. The bailiff removes Nitti and searches him, finding a note from Chicago Mayor William Hale Thompson which effectively permits him to carry the weapon. However, noticing Nitti possesses a matchbook with Malone's address written inside, Ness realizes that Nitti killed Malone. Panicked, Nitti shoots the bailiff before fleeing to the courthouse roof, where Ness captures him. After Nitti insults the memory of Malone and gloats that he will escape conviction for the murder, an enraged Ness pushes Nitti off the roof to his death, avenging Wallace and Malone.

Stone gives Ness a list, taken from Nitti's coat, which shows that the jurors in the trial are all on Capone's payroll. Behind closed doors, Ness persuades the judge to switch Capone's jury with one hearing an unrelated divorce case. This prompts Capone's lawyer to enter a guilty plea, although an outraged Capone violently objects. Capone is later convicted of tax evasion and sentenced to eleven years in prison. On the day Capone begins serving his sentence, Ness closes up his office, giving Malone's St. Jude medallion and callbox key to Stone as a farewell present. As Ness leaves the police station, a reporter asks him what he will do upon the probable repeal of Prohibition, to which he replies, "I think I'll have a drink."