Impossible (stylised as !mpossible) is a British television quiz show created by Hugh Rycroft and produced by Mighty Productions for BBC One.

Hosted by Rick Edwards, the show has a maximum prize of £10,000 and features questions in which some answer choices are "impossible" or inconsistent with the given category.

With the exception of Round 2 (see below), all questions used on the show are multiple-choice with at least one answer each of three different types: correct, wrong or "impossible".

", the choices could be: On each episode, a pool of contestants competes through two rounds until one is left to play for either the £10,000 jackpot or a smaller daily prize pot built up during the course of the game.

However, if all remaining contestants are eliminated on a single question, the entire pool is brought back into play.

After hearing the first half of a question, they choose five answers they believe to be impossible; each successful choice adds £100 to the daily prize pot and is removed from the board.

If a Qualifier begins with only one contestant left in the pool, they must still give a correct answer in order to advance to the Grid.

The last remaining contestant is asked one question in a randomly chosen category and shown nine answers; three each of correct, wrong and impossible.

The format was further altered in Series 4 in that the departing contestant was no longer replaced, leaving that seat empty for subsequent episodes.

On 20 February 2018, it was announced that Impossible would be launching a primetime Celebrity version which began to air in August that year.