Harold Rowe Holbrook Jr. was an American actor. He first received critical acclaim in 1954 for a one-man stage show that he developed called Mark Twain Tonight! while studying at Denison University. He won the Tony Award for Best Actor in a Play in 1966 for his portrayal of Twain. He continued to perform his signature role for over 60 years, only retiring the show in 2017 due to his failing health. Throughout his career, he also won five Primetime Emmy Awards for his work on television and was nominated for an Academy Award for his work in film.

Deep Throat is the pseudonym given to the secret informant who provided information in 1972 to Bob Woodward, who shared it with Carl Bernstein. Woodward and Bernstein were reporters for The Washington Post, and Deep Throat provided key details about the involvement of U.S. president Richard Nixon's administration in what came to be known as the Watergate scandal. In 2005, 31 years after Nixon's resignation and 11 years after Nixon's death, a family attorney stated that former Federal Bureau of Investigation (FBI) Associate Director Mark Felt was Deep Throat. By then, Felt was suffering from dementia and had previously denied being Deep Throat, but Woodward and Bernstein then confirmed the attorney's claim.