Rick Jarmin (Mel Gibson) helped convict a drug-dealing FBI agent named Eugene Sorenson (David Carradine) and was placed in the witness protection program. Fifteen years later his former fiancée Marianne Graves (Goldie Hawn) crosses paths with him at a gas station in Detroit, Michigan. Rick refuses to recognize Marianne as the witness protection program does not allow contact with people from the witness' previous life. If she recognizes him it may lead to Sorenson finding and killing him.
The film follows a day in the life of Los Angeles Police Department officer, Jake Hoyt, who is scheduled to be evaluated by Detective Alonzo Harris, a highly decorated LAPD narcotics officer. In Alonzo's car, the officer sees teenage Mara Salvatrucha gang members dealing drugs in a park. Alonzo confiscates the drugs and tells Jake to take a hit of the marijuana. Jake refuses, but Alonzo puts a gun to his head and says that Jake's failure to use drugs could get him killed by a street dealer.
During Prohibition in 1930s, Al Capone (De Niro) has nearly the whole city of Chicago under his control and supplies illegal liquor. Bureau of Prohibition agent Eliot Ness (Costner) is assigned to stop Capone, but his first attempt at a liquor raid fails due to corrupt policemen tipping Capone off. He has a chance meeting with Irish-American veteran officer Jimmy Malone (Connery), who is fed up with the rampant corruption and offers to help Ness, suggesting that they find a man from the police academy who has not come under Capone's influence. They recruit Italian-American trainee George Stone (Andy García) for his superior marksmanship and intelligence. Joined by accountant Oscar Wallace (Charles Martin Smith), assigned to Ness from Washington, D.C., they conduct a successful raid on a Capone liquor cache and start to gain positive publicity, with the press dubbing them "The Untouchables." Capone later kills the henchman in charge of the cache as a warning to his other men.
Tom Ludlow (Keanu Reeves) is a disillusioned LAPD Vice detective working for a unit known as Vice Special and haunted by the death of his wife. Working undercover, he meets with Korean gangsters (whom he believes have kidnapped two Korean schoolgirls) in a parking lot, who are looking to buy a machine gun from him. After a vicious beatdown, the Koreans then proceed to steal Tom's car. Tom however planned on this and has the cops locate the vehicle via GPS. Upon arrival at their hideout, Tom storms in and kills the four inside with his .45 Smith & Wesson 4506 pistol, and then locates the missing children after covering up what really happened. While the other officers in his unit congratulate him, he is confronted by his former partner, Detective Terrence Washington (Terry Crews). Washington no longer approves of the corruption and deception and has gone straight, reporting the problems to Captain James Biggs (Hugh Laurie), of internal affairs, who starts an investigation against Ludlow.
In the fictional town of Garrison, New Jersey, located across the Hudson River from New York City, a number of residents are NYPD officers. Local Sheriff Freddy Heflin (Sylvester Stallone) is secretly in love with Liz Randone (Annabella Sciorra), whose life he once saved after a car accident. Her rescue cost him the hearing in one ear and made him ineligible to become a New York City cop, as so many of his peers did, including Liz's abusive and unfaithful husband Joey Randone (Peter Berg).
Jimmy Egan (Colin Farrell) leads the New York City Police Department to victory in police-league football. While everybody is celebrating, Francis "Franny'" Tierney Jr. (Noah Emmerich), Jimmy's brother-in-law and superior officer, answers his phone to find out that several men from their unit have been killed during a failed drug bust of a local gang leader, Angel Tezo.
Working as a uniformed patrolman, Frank Serpico excels at every assignment. He moves on to plainclothes assignments, where he slowly discovers a hidden world of corruption and graft among his own colleagues. After witnessing cops commit violence, take payoffs, and other forms of police corruption, Serpico decides to expose what he has seen, but is harassed and threatened by his peers. His struggle leads to infighting within the police force, problems in his personal relationships, and his life being threatened. Finally, after being shot in the face during a drug bust on February 3, 1971, he testifies before the Knapp Commission, a government inquiry into NYPD police corruption between 1970 and 1972. After receiving a New York City Police Department Medal of Honor and a disability pension, Serpico resigns from the force and moves to Switzerland.
Singham opens with an honest police officer in Goa, Rakesh Kadam (Sudhanshu Pandey), committing suicide because of false accusations of corruption by Jaikant Shikre (Prakash Raj), a don and politician in Goa running a kidnapping racket. Kadam's wife Megha Kadam (Sonali Kulkarni) vows revenge.
The film begins with two anti-corruption detectives observing the discovery of dead bodies in a car being recovered from the bottom of a harbor. The detectives suspect that the drowned bodies are related to the recent gang war and power struggle at the huge Sanno-kai crime syndicate, which covers a large portion of eastern Japan. The new Grand Yakuza leader of Sanno-kai, Kato (Tomokazu Miura), must now reform his standing with the powerful rival Hanabishi-kai of western Japan. Otomo (Beat Takeshi), a former Yakuza, is serving time in a maximum security prison after falling out of favor with Sekiuchi, the former Grand Yakuza before Kato murdered him and took control.
The film opens in Thailand, with Antonio Serrano (Nick Mancuso), a mafia drug distributor visiting long-time associate Kinman Tau (Tzi Ma), a drug kingpin. Serrano is having troubles and wants them to work together, but his request is not reciprocated.
Captain Roberto Nascimento (Wagner Moura) narrates the film, briefly explaining how the police and the drug lords of Rio de Janeiro cooperate with each other (policemen collect periodic bribes and drug lords are left free to operate) in the 90's.
Undercover narcotics officer Nick Tellis (Jason Patric) chases a drug dealer through the streets of Detroit after Tellis' identity has been discovered. During the pursuit, the dealer holds a child hostage. Tellis shoots and kills the dealer before he can hurt the child, however a stray bullet hits the child's pregnant mother, causing her to miscarry.
Mike Brennan, a tough, crude, decorated NYPD detective, has a hidden dark side as well as a partnership with certain figures of organized crime. Brennan shoots and kills a small-time Puerto Rican criminal and then threatens witnesses to testify that he acted in self-defense. The Commissioner of Police Kevin Quinn assigns the case to Deputy Attorney Aloysius "Al" Francis Reilly, a young lawyer with a past as a police officer and son of a well-known cop who died in service. Reilly collects Brennan's deposition, who claims to have been acting on a tip from an informant and was forced to shoot in self-defense. Reilly's case leads him to a Puerto Rican crime boss called "Bobby Tex," whose wife Nancy Bosch was once the love of Reilly's life. She ended their relationship years ago after interpreting Al's reaction of surprise as racist when she introduced him to her father, a black man. Al tries to rekindle their past romance, but she rejects him because with Bobby, she feels loved, protected and accepted for what she is.
Detectives Liam Casey (Ian Holm) and Joey Allegretto (James Gandolfini) are conducting a surveillance operation to apprehend Jordan Washington (Shiek Mahmud-Bey), a notorious drug dealer. On a tip from an informant, they venture into a building where Washington is presumed to be hiding. Washington preemptively fires a submachine gun through his front door, seriously wounding Casey. Police backup units arrive and swarm the building, but Washington executes a cunning escape in an NYPD squad car after murdering two police officers, while police officers mistakenly kill another one.
The film begins with a sumptuous banquet at the opulent estate of the Grand Yakuza leader Sekiuchi (Soichiro Kitamura), boss of the Sanno-kai, a huge organized crime syndicate controlling the entire Kanto region, and he has invited the many Yakuza leaders under his control. After the formal conclusion of the banquet, Kato, the chief lieutenant of Sekiuchi, pulls one of the Yakuza leaders, Ikemoto, aside and makes plain that he is displeased with the news that Ikemoto has become friendly with a rival gang leader, Murase, while the two were unexpectedly imprisoned together. Kato orders Ikemoto to bring the unassociated Murase-gumi gang in line, and he immediately passes the task on to his subordinate Otomo (Beat Takeshi), who runs his own crew.