The Adventures of Ozzie and Harriet is an American television sitcom that aired on ABC from October 3, 1952, to April 23, 1966. In terms of seasons, it was the longest running live-action sitcom in U.S. television history until It's Always Sunny in Philadelphia surpassed it on December 1, 2021, in terms of total episodes produced: 435. The series starred the entertainment duo of Ozie Nelson and his wife, Harriet Nelson, and their sons, David and Ricky. Don DeFore had a recurring role as "Thorny" Thornberry.