Herbert Milton Stempel (December 19, 1926 – April 7, 2020) was an American television game show contestant and subsequent whistleblower on the fraudulent nature of the industry, in what became known as the 1950s quiz show scandals. His rigged six-week appearance as a winning contestant on the 1950s show Twenty-One ended in an equally rigged defeat by Columbia University teacher and literary scion Charles Van Doren.