After the success of "Police Woman", the first hour-long drama starring a woman, Ivan Goff and Ben Roberts came up with the idea for a series about three beautiful female private investigators as a breakthrough but also as an escapist television series. Producers Aaron Spelling and Leonard Goldberg first considered actress Kate Jackson during the early pre-production stages of the series. She had proven popular with viewers in another police television drama, "The Rookies". Jackson was initially cast as Kelly Garrett, but was more attracted to the role of Sabrina Duncan, and her request to switch roles was granted. Farrah Fawcett was next cast as Jill Munroe, but much like Jackson, did not audition for a role. She was offered a part by Spelling after he had viewed her performance in the 1976 film "Logan's Run". Jaclyn Smith was among the hundreds of actresses who auditioned for the role of Kelly Garrett. Despite liking Smith, Spelling and Goldberg were wary about hiring her because their initial concept concerned a brunette, blonde, and red-headed woman. Smith was the only brunette who auditioned for the role and was cast only after producers liked the on-screen chemistry she shared with Jackson and Fawcett.