Dirty Harry "Rawhide", was responsible for creating Callahan's distinctive old-fashioned brown and yellow checked jacket to emphasize his strong values in pursuing crime. Filming for "Dirty Harry" began in April 1971 and involved some risky stunts, with much footage shot at night and filming the city of San Francisco aerially, a technique for which the film series is renowned. Eastwood performed the stunt in which he jumps onto the roof of the hijacked school bus from a bridge, without a stunt double. His face is clearly visible throughout the shot. Eastwood also directed the suicide-jumper scene. The line, "My, that's a big
Dirty Harry (film series) Harry" films made their high-definition debuts with the 2008 Blu-ray discs. Warner's marketing plan calls for only "The Dead Pool" film to be available as a separate Blu-ray, requiring fans who want the other four movies in high definition to buy the box set. In 2010 all five movies were released as a Blu-ray box set, "Clint Eastwood Dirty Harry Collection". In the early 1980s, Warner Books published twelve books, authored under the pseudonym Dane Hartman, that further the adventures of Dirty Harry. The novels were later translated into French in the 1990s, as the "Collection Supercops". "" is a