 Shown as a 15 minute show until June 1949 on NBC. Expanded to a 30  minute format on NBC after its return from summer hiatus but  reverted to a 15 minute show when it moved over to CBS in October  1950 until June, 1955. After another summer hiatus and a move back  to NBC, it expanded to a full hour until it ended its weekly run in  June 1963. Kraft Foods assumed sponsorship from Chesterfield  Cigarettes in 1961.