Indiana Jones Chronicles" explains how Indiana becomes solitary and less idealistic following his service in World War I. In "Indiana Jones and the Kingdom of the Crystal Skull", Jones is older and wiser, whereas his sidekicks Mutt and Mac are youthfully arrogant and greedy, respectively. Indiana Jones is modeled after the strong-jawed heroes of the matinée serials and pulp magazines that George Lucas and Steven Spielberg enjoyed in their childhoods (such as the Republic Pictures serials, and the Doc Savage series). Sir H. Rider Haggard's safari guide/big game hunter Allan Quatermain of "King Solomon's Mines", who dates back to 1885, is a
Indiana Jones a documentary crew visited during shooting of "Indiana Jones and the Last Crusade". This created the urban legend that Ford stapled the hat to his head. Anytime Indy's hat accidentally came off as part of the storyline (blown off by the wind, knocked off, etc.) and seemed almost irretrievable, filmmakers would make sure Indy and his hat were always reunited, regardless of the implausibility of its return. Although other hats were also used throughout the films, the general style and profile remained the same. Elements of the outfit include: The fedora and leather jacket from "Indiana Jones and the Last