Dirty Harry local and federal police committing offences and overstepping their authority by entrapment and obstruction of justice. Author McGilligan, argued that America needed a hero, a winner at a time when the authorities were losing the battle against crime. The box-office success of "Dirty Harry" led to the production of four sequels. In the 2007 film "Zodiac", also set in San Francisco and inspired by the Zodiac Killer, cartoonist Robert Graysmith approaches police detective Dave Toschi at the cinema, where he is watching "Dirty Harry" with his wife. When Graysmith tells Toschi he is going to catch the Zodiac killer, Toschi
Dirty Harry (film series) "Weltanschauung"." Tom Charity of "CNN" said of Walt, "Like other Eastwood heroes before him, Walt sacrifices his independence by accepting that others depend on him." John Serba of "The Grand Rapids Press" said that Walt, who is "bitter, hopelessly cranky," "shares a sense of moral certainty" with Callahan, but that Walt "is infused with the wisdom and weariness" that Callahan does not have. Warner Home Video owns rights to the "Dirty Harry" series. The five films have been remastered for DVD three times — in 1998, 2001 and 2008. They have been packaged in several DVD box sets. The "Dirty