Yes, "The Departed" is loosely based on a true story. It draws inspiration from the real-life events surrounding the Irish-American mob in Boston and the Massachusetts State Police's efforts to infiltrate organized crime. The film is a remake of the Hong Kong movie "Infernal Affairs," which also explores themes of undercover work and betrayal. The characters and plot elements are fictionalized, but they reflect the historical context of crime and law enforcement in Boston during the late 20th century.

In "The Departed," directed by Martin Scorsese, there are a total of 489 instances of the F-word used throughout the film. This high frequency contributes to the film's gritty and intense atmosphere, reflecting the characters' emotions and the tension of the story. The film is known for its strong language, which aligns with its themes of crime and deception.

In "The Departed," the major plot twist occurs when it's revealed that Colin Sullivan, a mole within the Massachusetts State Police, has been feeding information to the Irish mob. At the same time, the undercover cop Billy Costigan is trying to infiltrate the same mob. The climax intensifies when both Sullivan and Costigan are revealed to be working against each other, leading to a shocking conclusion where Costigan is killed, and Sullivan manages to escape capture, only to meet a deadly end at the hands of another character later on.

As of October 2023, "The Departed" is not available on Netflix. However, streaming availability can vary by region and change over time. It's advisable to check other platforms like Amazon Prime Video, HBO Max, or rental services for access to the film. Always refer to your local streaming service for the most accurate information.