Spalko places the skull onto the headless skeleton. The aliens begin communicating to the group through Oxley in an ancient Mayan dialect, promising to reward them a "big gift." Spalko approaches and demands to "know everything." The aliens grant her request and transfer their collective knowledge into her mind, activating a portal to another dimension. Indiana, Marion, Mutt and the now-sane Oxley escape the temple, while Mac and the other Soviets are sucked into the portal; the skeletons, meanwhile, form a single alien which overwhelms Spalko with its knowledge, causing her brain to ignite and her body to disintegrate, her scattered essence absorbed into the portal. The temple crumbles, and a flying saucer rises from the debris and disappears to the "space between spaces." After they return home, Indiana is reinstated and made an associate dean at Marshall College, and he and Marion are married. Indiana's hat blows off his head and Mutt picks it up, but Indiana takes it back, saying "Not yet, kid"