There's something inherently captivating about the figure of the rat in a criminal organization. These films delve into the murky waters of loyalty, betrayal, and the quest for justice, where one individual's actions can unravel an entire empire. From undercover cops to double-crossing informants, these movies showcase the tension and drama that come with having a snitch in the ranks. Here are ten films that explore this theme, each offering a unique take on the consequences of betrayal within the criminal underworld.

The French Connection (1971)
Description: While not directly about a rat, this film features a detective who uncovers a drug smuggling operation, leading to a cat-and-mouse game with a French criminal mastermind.
Fact: The iconic car chase scene was filmed without permits, adding to its raw, gritty feel.


The Untouchables (1987)
Description: Eliot Ness assembles a team to bring down Al Capone, but their efforts are constantly undermined by corruption and informants within their ranks.
Fact: The film's famous train station scene was inspired by the real-life events of the St. Valentine's Day Massacre.


Goodfellas (1990)
Description: While not solely about a rat, the film explores the life of Henry Hill, whose eventual cooperation with the FBI leads to the downfall of his criminal associates.
Fact: The film was nominated for six Academy Awards and is often cited as one of the greatest films of all time.


A Bronx Tale (1993)
Description: A young man grows up in a neighborhood dominated by the mafia, where he learns about loyalty, betrayal, and the consequences of being a rat.
Fact: The film was based on a one-man show by Chazz Palminteri, who also stars in the movie.


Donnie Brasco (1997)
Description: Based on a true story, this film follows an FBI agent who infiltrates the Bonanno crime family. His deep cover role as "Donnie Brasco" leads to a complex relationship with a mobster, blurring the lines between loyalty and betrayal.
Fact: Johnny Depp's performance as Donnie Brasco was critically acclaimed, and the film was praised for its authentic portrayal of mob life.


Infernal Affairs (2002)
Description: A triad member is sent undercover to infiltrate the police force, while a police officer infiltrates the triad. Both must navigate the dangerous game of being a rat in their respective organizations.
Fact: This film was remade in Hollywood as "The Departed," but the original remains a landmark in Hong Kong cinema.


The Departed (2006)
Description: In this modern classic, an undercover cop infiltrates an Irish gang, while a mole in the police department feeds information to the mob. The tension rises as both sides try to unearth the rat in their midst.
Fact: The film was inspired by the Hong Kong film "Infernal Affairs," and it won four Academy Awards, including Best Picture.


The Town (2010)
Description: A group of bank robbers in Charlestown, Boston, face increasing pressure as one of their own becomes an informant, leading to a tense showdown with law enforcement.
Fact: Ben Affleck, who directed and starred in the film, grew up in Charlestown, giving the movie an authentic feel.


State of Grace (1990)
Description: An undercover cop returns to his childhood neighborhood in Hell's Kitchen, New York, to infiltrate the Irish mob, leading to a web of deceit and personal conflicts.
Fact: The film features a young Gary Oldman in one of his early roles, showcasing his talent for intense character portrayals.


The Informer (2019)
Description: An ex-convict turned informant for the FBI must navigate the dangerous waters of his past life while trying to protect his family from the wrath of the Polish mob he betrayed.
Fact: The film is based on the novel "Three Seconds" by Roslund & Hellström, and it was shot in both New York and London.
