Since I have a computer I took advantage of it and typed in Doby Gillis and got the following about Denver-)
Was Bob Denver’s first TV series: (a) Gilligan’s Island; (b) The Many Loves of Doby Gillis; or (c) The Good Guys?
A: The Many Loves of Doby Gillis, 1959-63. He was Dwayne Hickman’s sidekick, Maynard G. Krebbs. Tuesday Weld played Thalia; Warren Beatty was Milton; Daryl Hickman was Davy.