cousins, where Beatty's Milton was a menacing and athletic physical threat, Franken's pompous, foppish Chatsworth tended to plot and scheme his way through competitions with Dobie, more often than not using his riches to get ahead. The Chatsworth character became popular enough that the producers had to consciously limit his appearances on the series to roughly one per month to prevent Franken from upstaging Hickman and Denver, but Franken stated both during and after Dobie Gillis that playing Chatsworth led him to be typecast and stifled his career. Young actor Bobby Diamond was brought on at the beginning of season four as Dobie's teenaged cousin, Duncan "Dunky" Gillis. By 1962, the 28-year-old Dwayne Hickman had begun to look too mature to carry the teenager-based plot lines, and instead Diamond's "Dunky" was given this material, with the older yet immature Maynard as a running partner. The character was dropped midway through the fourth season, with attention shifting back to the characters of Dobie, Maynard, Chatsworth, and Zelda for the remaining episodes of the series. Actresses who played Dobie's love interests included Cheryl Holdridge, Michele Lee, Susan Watson, Marlo Thomas, Sally Kellerman, Ellen Burstyn (then billed as Ellen McRae), Barbara Babcock, Sherry Jackson, and Danielle De Metz. Yvonne Craig appeared in the opening credits and the closing sequence of the pilot film used to sell the series to CBS, but did not appear in the actual episode, "Caper at The Bijou", when it was broadcast. She eventually played five different girlfriends on the show, more than any other actress. Actress Sherry Alberoni, an original Mickey Mouse Club "Mouseketeer", played one of Zelda Gilroy's sisters in the 1960 episode "Dobie Spreads a Rumor". Other media After the first season of The Many Loves of Dobie Gillis had aired, Capitol Records attempted to make a recording star out of Dwayne Hickman, ignoring the fact that Hickman, by his own admission, was not a singer. Recording engineers had to piece together numerous takes to get a usable vocal track from Hickman for each song. Hickman introduced several of the songs from the Dobie! album on the show during its second season, including "I'm a Lover, Not a Fighter" and "Don't Send a Rabbit". Earlier, while Hickman was appearing on Love That Bob, he had recorded a single, "School Dance", for ABC-Paramount Records, but both the single and the later Capitol album sold very few copies.