About 1 vs 100
1 vs. 100 was a BBC National Lottery game show, originally hosted by Dermot O'Leary for the first 2 series then, Ben Shephard took over to host the show for the last 2 series.
The aim of the game is for one contestant to answer questions against 100 others and eventually try to eliminate them all. The player has a choice of two topics and are asked a three-way multiple choice question on their chosen category. The "100" are given six seconds to answer via pressing a keypad.
If the '1' answers correctly, they stay in the game. If they are wrong, they leave with nothing. If any of the 100 get a question wrong they are eliminated, and for each elimination the 1 receives £1,000. However, to get their hands on the money they must eliminate all 100 opponents.
After the player has earned some money, they are given three "dodges". These allow the 1 to avoid answering a question - however, wrong answers from the 100 are still eliminated but the 1 doesn't earn any money for this. To cap it all, the 1's current money is halved. Also available is one "double", a joker the 1 can play before answering a question where upon each elimination of the 100 is worth £2,000 a head.
A "bonus dodge" topic comes up later in the game when the 1 has eliminated 75 of the 100. This is a question of an unknown subject matter which is worth an extra dodge (but cannot itself be dodged).
When the player has failed or completed their run, the next 1 is selected from those in the 100 who remained in the game, or if the player defeated the 100, all of them are in contention to play next.