Scooby-Doo is a popular and long-running animated series produced for television by Hanna-Barbera Productions from 1969 to the present day.

Though the format the show and the cast (and ages) of characters have varied significantly over the years, the most familiar versions of the show feature a talking Great Dane named Scooby-Doo and four teenagers: Fred "Freddie" Jones, Daphne Blake, Velma Dinkley, and Norville "Shaggy" Rogers.

These five characters (officially referred to collectively as "Mystery, Inc.", but never referred to as such in the original series) drive around the world in a van called the "Mystery Machine," and solves mysteries typically involving tales of ghosts and other supernatural forces.

At the end of each episode, the supernatural forces turn out to have a rational explanation (usually a criminal of some sort attempting to scare people away so that he/she could commit crimes).

Later versions of the show featured different variations on the supernatural theme of the show, and include additional characters, such as Scooby's cousin Scooby-Dum and his nephew Scrappy-Doo, in addition to or instead of some of the original characters.

Repeats of the original series, as well as second-run episodes of the current series, are broadcast frequently on Networks around the world.

As of October 2004, Scooby-Doo holds the Guinness World Record for having the most episodes of any cartoon series ever produced, a record previously held by The Simpsons.