dragged forward at incredible velocity. Before being rendered unconscious by the mounting g-forces, Koenig manages to switch the instruments to automatic and Morrow brings them safely back to Alpha. During this activity, a ball of light drops down to the Moon's surface and, at an Alpha airlock station, deposits a smiling Helena. Helena is taken to Medical for a comprehensive work-up. All the tests come back fine, except one—despite all evidence to the contrary, the results of her eye exam indicate she should be blind. Faced with this physiological contradiction, the only logical conclusion is that she has undergone the same processing procedure used on Ted Clifford. Moving to Bergman's quarters, the professor finds a possible reference to the Tritonians as the 'Eyes of Heaven' in the Pyramid Texts of the Old Kingdom of Ancient Egypt, revealing their long-term observation of Mankind. Helena recalls that she was not wearing her spacesuit, indicating the sphere contains a breathable atmosphere. With that, Bergman speculates the Tritonians may have a recognisable humanoid form. This brainstorming session is interrupted by the Tritonians' activation of Helena. In a trance-like state, she moves through Alpha, dematerialising at will to avoid all obstacles. She reaches Main Mission and approaches the Main Computer terminal. There, she begins the same hyperactive operation of Computer as Clifford had done. Kano reviews the accessed memory cells; he reports one of the first cells scanned and transmitted through Helena stored the complete schematics of the Moonbase life-support system. At the rate of her current activity, Bergman surmises that they have 132 hours until Helena exhausts Computer's memory store. Mathias, though, reports that she will be dead long before that. Bergman and Koenig meet to discuss the Triton entities, figuring they must have some physical limitation that prevents them from leaving their sphere. Each brings some important information to the table. Bergman has determined from his galaxy charts that the planet Triton no longer exists. Koenig forwards a report from Kano that the malfunction of a computer memory cell disabled the Triton force-field for the thirty-two seconds required for the system to correct the error. They realise that there must be a circuit from the sphere, to the force-field around the Moon, to Helena, to Computer, and back to the sphere. With all the other components controlled by the Triton probe, Computer is the only exploitable link in the chain. A plan is