500 Keys

"500 Keys" is the twenty-first episode of the twenty-second season of The Simpsons. It first aired on the Fox network in the United States on May 15, 2011. It was written by John Frink and directed by Bob Anderson.

Plot

After returning from a shop that sells returned wedding cakes, Maggie gets locked in the car with the key inside. While searching for the spare keys (which soon proves unnecessary, as Maggie is able to free herself), the Simpsons discover a collection of keys to every door in Springfield. Lisa uses a key and finds a hidden classroom full of theater props underneath the school. She is intrigued by the discovery, and shares it with Principal Skinner, but when she brings along the school newspaper, they only find what is supposed to be behind the door, the "Banned Band Books". It becomes apparent that Skinner and Superintendent Chalmers are hiding something when they snatch the key from Lisa. She has the key replicated and returns to the door on her own, and finds the classroom is back; it had been hidden behind a phony set of bookshelves. She also sees a mysterious figure writing "The children are on Bus 23" on the chalkboard. Lisa is determined to solve the mystery of the hidden room.

Key

Key may refer to:

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Keys (surname)

Keys is a surname, and may refer to:

See also

19 Keys

19 Keys was a British game show that aired on Five. It aired five nights a week from 10 November to 5 December 2003. It was hosted by Richard Bacon.

Format

Four contestants each stand at a podium inside a glass cube. Each of the podiums has a panel with 19 squares on it, each representing one of the show's 19 keys. During the first two rounds of play, the host asks a series of questions, correct answers would randomly eliminate one of the show's 19 keys on that contestant's panel, whereas incorrect answers would cause one key to be relit.

In Round 2, the contestants have the option to answer a question for themselves or pass it to one of their opponents in the hope that they get it wrong. Upon reaching seven keys eliminated, the contestant could either relight one key each on two of their opponents' panels or two keys on one opponent's panel.

However, in round 3, contestants are given a choice as to how difficult each question was, with three levels of difficulty. As the game progressed, two timers, a clock timer and money timer would run concurrently with one another.