Lon Leonard \"Lonny\" Chapman was an American television actor best known for his numerous guest star appearances on drama series, such as Storefront Lawyers, Quincy, M.E., The A-Team, Murder, She Wrote, Matlock, and NYPD Blue. He played \"Ernie the plumber\" in the 1954 movie, Young at Heart, starring Doris Day and Frank Sinatra,\nHe also appeared as a guest star on the CBS adventure/drama Harbourmaster, starring Barry Sullivan, and on the same network's anthology series The Lloyd Bridges Show. He guest starred too in several episodes of NBC's McCloud, which starred his long-time friend Dennis Weaver, whom Chapman had originally urged to go into show business. He also appeared in three episodes of Gunsmoke and appeared in such series as The Rifleman, The Everglades, Decoy and Dundee and the Culhane. In 1964 he appeared on Perry Mason as murderer Jack Talley in \"The Case of the Tandem Target\". In 1966, Chapman appeared in the episode \"Lone Woman\" of The Road West. In 1977, he appeared in the episode \"The Waterhole\" on The Oregon Trail and in 1979 in the episode \"Now You see Her...\" on The Eddie Capra Mysteries.