The True Story Behind AMC's 'Quiz' Proves Cheating Scandals Can Be the Best Mysteries

cosmopolitan.com:

The true crime story at the heart of the AMC and ITV mini-series started when Major Charles Ingram won Who Wants To Be A Millionaire in 2001 and days later was arrested with his wife Diana for cheating.

Yes, their names really are Charles and Diana. According to The Independent, on the series before and she helped train her husband in button pressing before his appearance.

Producers became suspicious when Charles' behavior on the show seemed weird, and his correct final answers didn't match any of his guesswork.

Remember how a big part of Who Wants To Be A Millionaire is talking the question out? He even went so far as to say he'd never heard of a particular song, and then managed the name the singer out of nowhere.