children—the youngest (Susan Olsen) was 12 years old during the show's final season. Lloyd Schwartz, son of creator and executive producer Sherwood Schwartz, later admitted that the character threw off the balance of the show and said that fans regarded the character as an interloper. Oliver appears in the final six episodes of season five, which proved to be the final season, as ABC cancelled the series in 1974. The addition of the character has been cited as the moment the series "jumped the shark". The term "Cousin Oliver" has been used to describe the addition of a young character as an attempt to save a series from cancellation. Notable guest stars Herbert Anderson as a doctor who comes to treat the boys' measles in "Is There a Doctor in the House?" (season one). Melissa Sue Anderson played Millicent, a girl who gives Bobby his first kiss ("Never Too Young", season five). Desi Arnaz Jr. meets Marcia, who wrote about him in her diary in "The Possible Dream" (season one). Jim Backus appears three times in the series, twice in two of the three Grand Canyon episodes, "Ghost Town U.S.A." and "Grand Canyon or Bust", playing Zaccariah T. Brown, who mistakenly thinks the Bradys are jumping his gold claim and locks them in a ghost-town jail; and in "The Hustler" (season five) playing Mike's second boss, Mr. Harry Matthews. Ken Berry played Ken Kelly, the Bradys' new neighbor who is the adoptive father of three diverse boys (black, white, and Asian) in the season five episode "Kelly's Kids". Sherwood Schwartz was attempting to sell a spin-off series called Kelly's Kids featuring Berry, but the show idea failed to interest ABC. Imogene Coca plays the Brady girls' great-aunt Jenny, whom Jan fears she will grow up to resemble after seeing a childhood photo of her in "Jan's Aunt Jenny" (season three). Don Drysdale tries to inject reality into Greg's dreams of being a professional baseball player in "The Dropout" (season two). Don Ho meets Cindy and Bobby and serenades Cindy in Honolulu in "Hawaii Bound" (part one of a three-part season-four episode), filmed on location in Hawaii. Davy Jones (of The Monkees) performs at a music studio and then takes Marcia to her school dance in "Getting Davy Jones" (season three). Decades later, Jones satirized his cameo in The Brady Bunch Movie. Deacon Jones encourages Peter's singing in "The Drummer Boy"