That was when they began going into details. Strength of the underground, possible allies, weaknesses of Candar.... Thane was beginning to see the picture, and the tremendous obstacles to be overcome, when a buzzer sounded and a red light over the door blinked DANGER ... DANGER ... DANGER.... IV Pyuf ran over to a cabinet on the wall by the fire. Thane saw there were several dials and a visiscreen. As Pyuf twisted the dials he spoke rapidly over his shoulder to Thane. "We're quite isolated here. The house belongs to the old boy you met in the lab. He's been checked for security by Candar so we figured we were safe here. There's a detection screen about a kilometer hour from the house, and we have a force screen we can use as a last resort. Of course, we'd have to abandon this place once we did use it. Candar's detectors would pick it up right away." The visiscreen came into focus and Pyuf turned the perimeter dial till it lined up with the degree mark on the disturbance indicator. Nine figures appeared, advancing toward the house. Three were short and squat--not over a meter and a half in height. They walked with the peculiar slouch of the Darzent entity in its humanoid phase. The other six were the Darzent robot infantry. Two and a half meters high, impervious to any hand weapon, with built-in blasters and the Darzent version of the Stoltz gun. Their ship was in the background. It had the outlines of an ordinary atmosphere jet of medium size, but there were alterations which made Thane suspect that it had been refitted for deep space, with at least the finite drive, and probably FTL. Thane spun around to the others. "We either put up the force screen or get out now," he said. "Unless, that is, there's some heavy artillery around the house. Nothing else will stop a Darzent Robot. And even the screen probably won't last long. That ship looks as though it has enough high powered stuff to breach any screen we can put up." Astrid looked up at him. "We do have the jet, Roger. It's armed, but it will take time to get it ready for take-off." "Let's get the force screen up now, then." Pyuf snapped switches. The whine of power at emergency levels began. The Darzent force had screen detectors, because they stopped at once and turned back to their ship. Short, sharp rocket blasts shot out from the bow tubes of the ship, as it turned on its axis to attack the force screen. "Let's get going," Thane said. "We all can't go," Pyuf pointed out. "Our jet is only two-place, and anyway, someone will have to cut off the screen to let the jet out." "You and I can do it," Astrid said to Thane. "I can handle the engines and the defensive screens while you fly it and man the gun."