During the 1950s, Hammett was investigated by congress. He testified on March 26, 1953, before the house un- american activities committee about his own activities but refused to cooperate with the committee. No official action was taken, but his stand led to his being blacklisted along with others who were blacklisted as a result of McCarthyism .Hammett became an alcoholic before working in advertising and alcoholism continued to trouble him until 1948, when he quit after his doctor's orders. 

Calhoun Horne (June 30, 1917 – May 9, 2010) was an African American jazz and pop music singer, dancer, actress, and civil rights activist. How they ended up on the Blacklist: By the mid-1950s, Horne was disenchanted with Hollywood and increasingly focused on her nightclub career. She only made two major appearances for MGM during the 1950s: Duchess of Idaho (which was also Eleanor Powell's final film); and the 1956 musical Meet Me in Las Vegas. She was blacklisted during the 1950s for her affiliations in the 1940s with communist-backed groups. She would subsequently disavow communism.

Elia Kazan was a Greek-American director, producer, writer and actor, described by The New York Times as "one of the most honored and influential directors in Broadway and Hollywood history". He was born in Istanbul, to Cappadocian Greek parents