Indiana Jones and the Last Crusade was the focus of a "Young Indiana Jones" series of young adult novels that began in 1990; by the ninth novel, the series had become a tie-in to the television show. German author Wolfgang Hohlbein revisited the 1912 prologue in one of his novels, in which Indiana encounters the lead grave robber—whom Hohlbein christens Jake—in 1943. The film's ending begins the 1995 comic series "Indiana Jones and the Spear of Destiny", which moves forward to depict Indiana and his father searching for the Holy Lance in Ireland in 1945. Spielberg intended to have Connery cameo as Henry in "Kingdom of
Indiana Jones and the Kingdom of the Crystal Skull of "Indiana Jones and the Last Crusade", Lucas let the series end as he felt he could not think of a good plot device to drive the next installment, and chose instead to produce "The Young Indiana Jones Chronicles" for TV, which explored the character in his early years. Harrison Ford played Indiana in one episode, narrating his adventures in 1920 Chicago. When Lucas shot Ford's role in December 1992, he realized the scene opened up the possibility of a film with an older Indiana set in the 1950s. The film could reflect a science fiction 1950s B-movie, with aliens