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The classic Dragnet opening narration and theme, introducing a true crime story with names changed to protect the innocent. Creators use it in parodies.

This is the instantly recognisable opening of Dragnet, beginning with its dramatic four-note brass theme before a calm, authoritative narrator announces that the story you are about to see is true and that the names have been changed to protect the innocent. The music is bold, urgent and slightly ominous, while the voice is steady and matter-of-fact, creating the feeling of an official police case file being opened. That contrast makes listeners immediately expect a serious investigation, which is exactly why it works so well when the reveal that follows is ordinary, silly or completely unexpected.

Dragnet began as an American radio drama in 1949 and moved to television in 1951, with Jack Webb starring as Los Angeles police Sergeant Joe Friday. Its opening narration presented each episode as a true story with changed names, a device that helped define the police procedural genre on screen. The theme and narration were widely parodied in later comedy, and clips of the introduction now circulate online as shorthand for a serious investigation. Creators still use it to give an ordinary moment the weight of an official case.

專業使用技巧

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Place it over a title card or a slow zoom on an everyday object, then cut to the punchline as the narration ends. Keep the brass theme intact and do not talk over the famous line, because the joke lands when the setup stays untouched.

使用案例

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  • Opening a mock investigation into a missing snack.
  • Introducing a dramatic reveal in a comedy sketch.
  • Narrating a parody detective story on TikTok.
  • Setting up a true crime style prank video.

常見問題

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What is the Dragnet intro sound?
It is the opening of the classic American police series Dragnet, featuring its dramatic brass theme and a narrator stating that the story is true and the names have been changed to protect the innocent.
Where does the Dragnet intro come from?
Dragnet began as a radio drama in 1949, before moving to television in 1951. Jack Webb starred as Sergeant Joe Friday, a Los Angeles detective whose cases were presented as based on real events.
Why do creators use the Dragnet intro in videos?
Because it instantly signals a serious police investigation, creators can use it to make an ordinary moment feel important before delivering a funny or unexpected punchline. The contrast between the formal tone and the silly subject is what makes the joke work.

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