His name is Henry Walton Jones Jr. But everyone knows him as Indiana. He's the protagonist of four films, all directed by Steven Spielberg and produced by George Lucas, based on Lucas' original idea and on scripts co-written by Lucas and writers that include Philip Kaufman, Lawrence Kasdan and – with the most recent film, "Indiana Jones and the Kingdom of the Crystal Skull," which opened Thursday – David Koepp. He's also been the subject of a television series, a book series, a Disney theme-park ride and has even appeared in a number of video games. Those of us who have seen the films all know the character. Or at least we think we do. But who is Indiana Jones, really? A trek through Web sites such as www.theindyexperience.com can elicit lots of information, most of it compiled from the sources listed above balanced with the odd interview from the Lucas-Spielberg crowd. The rewards of such a search can result in a fascinating look at a fictional life. (Warning: There may be a spoiler or two for those who haven't yet seen "Kingdom of the Crystal Skull.")