The World of Mr. Sweeney is an American sitcom that aired on NBC in primetime and daytime. The series first aired live in primetime from June 30, 1954 to August 20, 1954, four nights a week from Tuesday to Friday, and from October 1954 to December 1955 five days a week in daytime. A total of 345 episodes were produced. The series began as a segment on The Kate Smith Evening Hour.