Mastermind is a British game show, well known for its challenging questions, intimidating setting and air of seriousness. Devised by Bill Wright, the basic format of Mastermind has never changed—four and in later contests five or six contestants face two rounds, one on a specialised subject of the contestant's choice, the other a general knowledge round. Wright drew inspiration from his experiences of being interrogated by the Gestapo during World War II.