During the postwar years, Knight studied acting in Hartford, Connecticut. He became proficient with puppets and ventriloquism, which led to steady work as a television kiddie-show host at WJAR-TV in Providence, Rhode Island, from 1950 to 1955. In 1955, he left Providence for Albany, New York, where he landed a job at station WROW-TV (now WTEN), hosting The Early Show, featuring MGM movies; and a kids' variety show, playing a "Gabby Hayes" type character named "Windy Knight". He was also a radio announcer for sister station WROW radio. He left the station in 1957 after receiving advice from station manager (and future Capital Cities Chairman) Thomas Murphy that he should take his talents to Hollywood.