A spoiler is a piece of information in an article about a narrative work (such as a book, feature film, television show or video game) that reveals plot events or twists.

Spoilers on the Internet are sometimes preceded by a spoiler warning.^[1] In Wikipedia, however, it is generally expected that the subjects of our articles will be covered in detail. Therefore, Wikipedia carries no spoiler warnings [...].

Numbers stations are shortwave radio stations of uncertain origin. They generally broadcast voices reading streams of numbers, words, letters (sometimes using a radio alphabet), tunes or morse code.

The voices that can be heard on these stations are often mechanically generated. They are in a wide variety of languages, and the voices are usually women's, though sometimes men's or children's voices are used.

Evidence supports popular assumptions that the broadcasts are channels of communication used to send messages to spies. This has not been publicly acknowledged by any government that may operate a numbers station, but in one case, Cuban numbers station espionage has been publicly prosecuted in a United States federal court.