* Captain Kangaroo (the original show) aired from 1955 to 1984, with Bob Keeshan as the titular character.
* Captain Kangaroo (the 1986 revival) aired for one year, with the role of Captain Kangaroo being played by Lennie Weinrib.
Perhaps you are thinking of a different show or a specific episode? If you can provide more context, I may be able to help you find the information you are looking for.