Leonard Freeman (October 31, 1920 – January 20, 1974) was an American television writer and producer whose most famous achievement was the creation of the CBS television network series Hawaii Five-O in 1968, the show was remade in 2010. He appeared in a 1953 episode (#112) of the TV series, The Lone Ranger.The show ran for twelve seasons. At the time that was a record for a crime drama. In 1960, he wrote for the series Route 66; in 1962, he produced The Untouchables.