In the meantime, Stempel, disgruntled over being ordered to lose, attempted to blow the whistle on "Twenty-One", even going so far as to have a federal investigator look into the show. Initially, little came of these investigations and Stempel's accusations were dismissed as jealousy because there was no hard evidence to back up his claims. While a congressional investigation did affect "Twenty-One" during this period, the much larger ongoing investigation was the HUAC hearings into possible communists in entertainment; the show's director, Charles S. Dubin, was fired by NBC in June 1958 after he refused to answer whether he had ever been a member of the Communist Party USA.