Dwayne Bernard Hickman (born May 18, 1934) is an American former actor and former television executive at CBS.Hickman is known primarily for "teenager" roles on television sitcoms. The brown-haired Hickman portrayed Chuck MacDonald, Bob Collins's (played by Bob Cummings) crazy teenaged nephew, on the 1950s NBC series The Bob Cummings Show (a.k.a. Love That Bob in reruns), and the initially blond title character in CBS's The Many Loves of Dobie Gillis.