In the shadowy world of crime, loyalty is often tested, and betrayal can come from the least expected places. This curated list of 10 films delves into the lives of informants, those who walk the tightrope between two worlds, offering a glimpse into the moral dilemmas and high stakes involved. From gritty tales of undercover operations to the psychological warfare of snitching, these films provide a thrilling exploration of what it means to be a 'rat' in the criminal underworld. Whether you're a fan of classic cinema or modern thrillers, this collection promises to keep you on the edge of your seat with its portrayal of informants and their treacherous paths.

The French Connection (1971)
Description: This film features a gritty portrayal of two NYPD detectives who uncover a heroin smuggling ring, with one detective going undercover to gather information.
Fact: The famous car chase scene was filmed without permits, leading to real-life chaos on the streets of New York.


The Untouchables (1987)
Description: Eliot Ness forms a team to take down Al Capone, with one of his men becoming an informant within Capone's organization.
Fact: The film's iconic train station scene was inspired by the real-life Union Station massacre in Kansas City.


Donnie Brasco (1997)
Description: Based on a true story, this film follows FBI agent Joe Pistone, who infiltrates the Bonanno crime family under the alias Donnie Brasco, becoming a trusted informant.
Fact: Johnny Depp's performance was so convincing that real-life mobsters believed he was an actual undercover agent.


The Insider (1999)
Description: This film tells the true story of a tobacco industry whistleblower, highlighting the personal and professional risks of being an informant.
Fact: Al Pacino and Russell Crowe both received Academy Award nominations for their performances.


The Departed (2006)
Description: This film revolves around an undercover cop infiltrating the Irish mob and a mole within the police department, showcasing the ultimate game of cat and mouse between informants.
Fact: Martin Scorsese won his first Best Director Oscar for this film, and it's a remake of the Hong Kong film "Infernal Affairs."


American Gangster (2007)
Description: While not directly about an informant, the film showcases the rise and fall of drug lord Frank Lucas, with a subplot involving an informant who helps bring him down.
Fact: Denzel Washington and Russell Crowe improvised much of their dialogue, adding authenticity to their performances.


The Town (2010)
Description: A group of bank robbers in Boston are pursued by an FBI agent, with one of the robbers becoming an informant to protect his love interest.
Fact: Ben Affleck, who also directed, did extensive research on Boston's criminal underworld for authenticity.


The Informer (1935)
Description: Set in the 1920s, this classic film tells the story of Gypo Nolan, who betrays his friend to the police for a reward, leading to a tragic chain of events.
Fact: This film won four Academy Awards, including Best Actor for Victor McLaglen.


State of Grace (1990)
Description: An undercover cop returns to his old neighborhood to infiltrate the Irish mob, only to find himself torn between duty and loyalty to his childhood friends.
Fact: Sean Penn was originally cast as the lead but had to drop out due to scheduling conflicts.


The Wire: Season 1 (2002)
Description: While not a film, this season of the acclaimed TV series focuses heavily on the use of informants in the drug trade, offering a realistic portrayal of urban crime.
Fact: Many of the actors were former criminals or police officers, lending real-life credibility to the show.
