TV's Jack is a reference to the character Jack Paar, who was an American television personality, comedian, and talk show host. He is best known for hosting The Tonight Show from 1957 to 1962. He was also the first host of the game show 'I've Got a Secret'. Paar was a pioneer in late night television, and his influence on the medium was immense. He was also known for his wit and humor, which made him a popular figure in the entertainment industry.