next she is hysterically screaming he is dead. Helena is forced to sedate her. The doctor informs a bewildered Carter of her intention: to jolt Regina out of her delusion with the shock of seeing him—her dead husband back from the grave. She shows him the picture Regina has painted of her world: a geodesic house sitting in a field of flowers with a cheerful sun in the sky. Continuous hails to the World Space Commission—or any Earth station—go unanswered. Koenig makes a base-wide announcement, reporting that Phase One of Operation Exodus (a reconnaissance probe of the surface) will be launched as soon as the Moon has safely settled into Earth orbit. Hearing his words, Regina awakens to a nightmare vision of a black-cloaked figure beckoning to her. She approaches and realises its face to be her own, older and saddened. After experiencing a sharp spasm of pain, she looks again: the face is now a skull. Terrified, she runs away—to be brought up short by her own reflection in an endless mirror. Screaming, Regina lashes out and smashes the mirror. Escaping from the care unit using Dr Mathias's comlock, she encounters a patrolling Security guard. In her madness, she clobbers him and takes his weapon. In Main Mission, the joyous announcement of the Moon's re-entry into Earth orbit is interrupted by Regina, wielding a stun-gun in one hand and holding her pain-wracked head with the other. Hysterical, she rejects all attempts to calm her, having eyes only for Carter. The girl flings herself into his arms, whispering, 'I knew you didn't die, I knew.' She convulses in agony, then goes limp. She is dead. Later, Bergman privately briefs Koenig on a startling revelation: the world, as they knew it, has been destroyed. A five-degree deviation in the tilt of Earth's axis has resulted in devastating geological and climatic changes. The only remotely habitable area is a site in southern California known as Santa Maria. Helena joins them with the results of Regina's autopsy. What she thought was a mental condition had an underlying physical cause—the girl's skull contained two separate brains, and the resulting pressure killed her. Further discussion is interrupted by an urgent summons. A celestial object is moving out from behind Earth. It is the duplicate Moon...from which they receive what sounds like their own Moonbase navigation signal. Bergman muses they have somehow caught up with themselves.