Friebus were cast as Dobie's parents, Herbert T. Gillis and Winifred Gillis. Faylen's gruff, no-nonsense father character, which according to Hickman, was essentially the same as Faylen's real-life personality, was more of an antagonist to Dobie during the first season of the show, his demeanor underscored by his often-repeated catchphrase "I gotta kill that boy! I just gotta!" Both CBS and Marlboro strongly disapproved of the catchphrase and the Herbert T. Gillis character's hard edges. An early season-two episode, "You Ain't Nothin' But a Houn' Dog" (episode two), in which Dobie inadvertently wins a father-and-son essay contest, was produced to explain why Herbert ceased use of his catchphrase. Herbert was further softened as the series wore on, the character's anger tempered to frustration. Recurring casting notes Experienced child actress Tuesday Weld was cast as Dobie's love interest in "Caper at the Bijou" and stayed on as a semiregular. Weld and Dwayne Hickman had previously appeared as a teenaged couple in the 1958 Fox feature film Rally 'Round the Flag, Boys!, based on a Max Shulman novel, though produced without his input. Neither Hickman nor Weld was fond of the other, with Hickman later stating he felt Weld was not as dedicated as necessary to rehearsal and referring to her as "a pain in the neck". Weld reportedly found Hickman pushy and out-of-touch. Aged 15 at the time of shooting the pilot, Weld had to legally spend much of her time on set in school with a tutor, and the production periodically ran into issues involving Weld's later publicly known difficult home life. Her work in Dobie Gillis and the feature film The Five Pennies made Weld a star, leading to substantial publicity. She departed the series after the first year to star in features, although she was persuaded by Max Shulman to return for two guest appearances, "Birth of a Salesman" (season three, episode 21) and "What's a Little Murder Between Friends?" (season four, episode two). Herbert Anderson was cast as Mr. Pomfritt, Dobie and Maynard's English teacher at school. Anderson appeared in a lead role in the pilot for Dennis the Menace; when that show was picked up (also by CBS), he chose to stay with that cast, and actor William Schallert appeared in the recurring role of Mr. Pomfritt through the end of season three. Warren Beatty was cast as Milton Armitage, a recurring rival of Dobie's at