William Thomas "Billy" Corcoran (born March 20, 1955 in Los Angeles, California) appeared as Harvey Klinger, a rather bookish, nerdy classmate of Marcia who briefly becomes her steady boyfriend in the Season 2 episode of The Brady Bunch titled "Going, Going... Steady". A former child actor, William made guest role appearances on several TV shows in the 1960s which included such shows as Daniel Boone, The Man from U.N.C.L.E., Batman and Bonanza. After seven years, William disappeared from Hollywood acting in 1971, only to resurface ten years later, as an adult in a bit role as a Horseman in an episode of the short-lived 1981 TV series The Great Detective.