The 21st Precinct was a popular American radio drama series that aired on CBS from 1953 to 1956. It was a gritty and realistic portrayal of the lives of police officers in New York City, and it quickly became a hit with listeners. The show was set in the fictional 21st Precinct, which was located in Manhattan. The main characters were Captain Frank Kennelly, played by Everett Sloane, and his team of detectives and patrolmen.

The show was known for its realistic portrayal of police work, and it often featured stories that were based on real-life crimes. The scripts were written by some of the best writers in radio, and the acting was top-notch. The show also featured a number of sound effects, which helped to create a sense of atmosphere and realism.

The 21st Precinct was a popular success, and it ran for three seasons. It was also adapted into a television series, which ran from 1956 to 1959. The radio show is still considered to be a classic of the genre, and it has been praised for its realism, its writing, and its acting.