army ants. Mac claims he is a CIA double agent. After surviving three waterfalls in an amphibious vehicle, Jones and Oxley identify a skull-like rock formation that leads them to Akator, unaware that Mac had lied about being a CIA agent and has been dropping transceivers to allow the surviving Soviets to track them. Jones's team evades the city's guardians, gains access to the temple, and finds it filled with artifacts from many ancient civilizations. They realize the aliens are "archaeologists" studying the different cultures of Earth. They find and enter a chamber containing 13 crystal skeletons, one of which is missing its skull. When Spalko arrives and replaces the skull, the skeletons telepathically offer to give a reward to the group, using Oxley as a translator. Her gift she wants is to simply know all the knowledge of the aliens; the aliens reanimate and transfer an overwhelming amount of knowledge into her mind, killing her. A portal to their dimension is activated, and Mac and all of the remaining Soviets are drawn in, while Jones and his team escape. As the city crumbles, a large flying saucer rises from the ruins and departs for another dimension, and the waters of the Amazon flood the hollow left by its takeoff. The following year, Jones is reinstated at Marshall College as its associate dean, and marries Marion, with Oxley, who has regained his sanity, and Mutt as witnesses. Cast Harrison Ford as Indiana Jones; To prepare for the role, the 64-year-old Ford spent three hours a day at a gym, practiced with the bullwhip for two weeks, and relied on a high-protein diet of fish and vegetables. Ford had kept fit during the series' hiatus anyway, as he hoped for another film. He performed many of his own stunts because stunt technology had become safer since 1989, and he also felt it improved his performance. Ford felt his return would also help American culture be less paranoid about aging (he refused to dye his hair for the role), because of the film's family appeal: "This is a movie which is geared not to [the young] segment of the demographic, an age-defined segment [...] We've got a great shot at breaking the movie demographic constraints." He told Koepp to add more references to his age in the script. Spielberg said Ford was not too old to play Indiana: "When a guy gets