As the Vegans poise to strike against Earth, Perkins takes a desperate gamble; against the strict orders of Colonel Jason, he hides Professor Common on a deserted moon station and merely disables the Dimension Transmitter, since he knows that the device is mankind's only hope to end this conflict. The Vegans invade Delta-4, but come up empty-handed and - as Perkins has hoped - are now willing to negotiate. To his surprise, the Vegan high commander turns out to be Bordon himself, who is also revealed as the telepathic voice which had lured Ralph into the Dimensional Transmitter. Bordon is participating in the war to prove that the humans are the ones to blame and the Vegans therefore have the right to retaliate. After much arguing, Perkins manages to persuade the Immortal to find the roots for the Vegan antipathy against the humans - by means of controlled time travel back to the last days of Sodom and Gomorrha.