The Million Pound Drop has a simple premise which could see participants answering general knowledge questions to win £1 million.
However, the twist is that the couple taking part begin the quiz with £1 million and have to answer questions to keep all of their cash.
Presented by Davina McCall, the show can be tense viewing at times as what appear to be seemingly easy questions to answer manage to defeat the couple concerned.
While no one has actually managed to keep hold of the entire amount of cash, most of those taking part have left with sums ranging from £25,000 to £350,000.
The Million Pound Drop started life in 2010 and more than 10 series have been broadcast with the show picking up a BAFTA along the way for its production team.
Part of the tension created by The Million Pound Drop is the show is broadcast live and uses social networking and an interactive website to encourage viewers at home to participate.
The show begins with a couple being handed £1 million in £50 notes at the beginning.
The money itself is in 40 bundles consisting of £25,000 and they must then answer just eight questions in a bid to keep as much of the money as they can.
The questions are multiple-choice and the couple can answer as many of the four options as they choose by splitting up the cash and putting bundles on what they think is the correct answer.
The wrong answers are announced by the trapdoor appearing underneath the money and the couple watch it drop out of view – hence the show’s title.
With each question, the couple has fewer options until the final question when only two options are given which means that if they put all of their remaining cash on one answer and its wrong then the cash will disappear.
In theory, the couple could get to the last question with their £1 million still intact and watch it drop through the trapdoor with a wrong answer.
A new twist is a double your money chance for the last question.