Mastermind 2019/20 Episode 1 Episode 1 ( Air Date 2019-08-09 ) Genre Talk category. Overview "John Humphrys presents the first heat of the relaunched series of the classic quiz, where contenders take the famous black chair under the glare of the spotlight and the ticking clock in an attempt to become the next Mastermind. Tonight’s specialist subjects are the Lake District, Sue Townsend novels, Stephen King and Dorothy Hodgkin.".