The Day of the Dolphin originally going to be directed by Roman Polanski for United Artists in 1969, with Polanski writing the script. However, while Polanski was in London, England, looking for filming locations in August 1969, his pregnant wife, the actress Sharon Tate, was murdered in their Beverly Hills home by disciples of Charles Manson. Polanski returned to the United States and abandoned the project. The following year it was announced Franklin Schaffner would make the movie for the Mirisch Corporation. These plans were frustrated and Joseph Levine ended up buying the project from United Artists for Mike Nichols. The film was mostly shot
Manson Family Charles Watson soon joined the group at Spahn's ranch. Watson, a small-town Texan who had quit college and moved to California, met Manson at Dennis Wilson's house. Watson gave Wilson a ride while Wilson was hitchhiking after his car was wrecked. Spahn nicknamed Watson "Tex" because of his pronounced Texan drawl. In the first days of November 1968, Manson established the Family at alternative headquarters in Death Valley's environs, where they occupied two unused or little-used ranches, Myers and Barker. The former, to which the group had initially headed, was owned by the grandmother of a new woman (Catherine Gillies)