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Put that to one side for a moment. Names. Think about the names. There was something at the back of his mind. Something linked all the names together. Lentrall. Gildern. The Settlers. The Ironheads. Someone or something that

And then he had it. He had it. There was one person with links to them all. And he knew who he was going to pull in first.

He looked out the window, and saw to his surprise that they were coming in on final approach to Depot. Good. They could get started right away.

He would be very surprised indeed if Norlan Fiyle didn’t have something to tell him about all this. He would send out an arrest team at once.

And while they were pulling him in, Justen was going to inform Kresh about the kidnapper’s two demands. He wasn’t going to be able to get the comet stopped, but there might just be something he could do about that ransom. He was starting to get an idea.

“DO WHAT YOU like about the ransom,” Kresh said to the image on the comm center screen on his office. “We can afford to front the money, if need be. And I agree it could do no harm to keep Gildern in the dark. But that comet is on course, and we’re not going to change that.”

“Understood, sir,” Devray replied. “Thank you for the authorization. I’ll keep you informed. Devray out.” The screen went dead.

“How long now, Donald?” Kresh asked.

“Initial impact of Comet Grieg is projected to occur in four days, eighteen hours, fifteen minutes and nine seconds. Sir, concerning the rescue of Simcor Beddle, I believe it would be wise if I were to go to the scene and-”

“Donald.” Fredda’s voice was flat and hard. “You are to leave the room at once. Go to the library and wait. Do not return, and do not take any further action of any kind until called for.”

Donald turned toward Fredda and looked at her for a full ten seconds before he responded. “Yes, ma’am. Of course.” He turned and left the room.

“First Law makes him want to save Beddle, in spite of Devray and his team being on the scene. I suppose we should have been expecting that,” Kresh said.

“I have been expecting it,” said Fredda. “Comet Grieg all by itself is enough to set off significant First Law stress in any robot. An event as big and violent as that, with so many chances for danger to humans, would have to set off First Law stress. The only way a robot could deal with that sort of thing at all would be to be active, to do something, to be part of the effort to protect humans from harm. Donald has been part of that effort. It’s why he’s been able to hold together as well as he has. It helped that the threat up until now has been generalized, unfocused. Something somewhere would probably go wrong somewhere to harm a human. Generalized preventive action was enough to balance that. The general and collective robot effort was enough to meet the general and collective threat.”

“But now it is all different,” Kresh said.

“Now it’s different,” Fredda agreed. “Now there is a specific and extreme threat against a known individual. Normally that would not be enough to cause a First Law crisis. A robot on this side of the world would know that the robots on that side of the world would do all that could be done. But with the overarching stress of the Comet Grieg impact on the one side, along with the high probability that Beddle is somewhere in the impact area-that combination of overlapping First Law stresses could force any robot into action.”

“What do you mean by action?” Kresh asked.

“Anything. Everything. I couldn’t even begin to sort out all the permutations between now and the impact. But the basic point is that Beddle’s disappearance could create a tremendous First Law crisis for every robot on the planet. If Beddle is indeed in the impact area-or even if there is merely reason to believe he might be-then any robot made aware of his circumstances will, in theory, be required to go to his rescue, or to work in some other way to save him-perhaps by trying to prevent the comet impact. Suppose some team of robots grabbed a spacecraft and headed for Grieg to try and destroy the comet? Of course, higher-function robots will understand that an attempt to prevent the comet’s impact might wreck hopes for reviving the planet’s ecology. That would almost certainly result in harm to any number of human beings, many of them not yet even born.

“Then there is the impossibility of proving a negative. Even with the best scanning system in the universe, unless Beddle walks out somehow, there can be no way of being absolutely sure he is not still in the impact area, or the danger zone surrounding it. It is therefore, at least in theory, possible that he is actually safe. If so, then working to save Beddle is wasted effort, and could actually cause danger to other nearby humans by preventing attention to their evacuation. It is just the sort of First Law crisis that could tie a robot in knots, even to the point of inducing permanent damage.

“It’s a morass of complex uncertainties, with no clear right action. There’s no telling how a robot would deal would balance all the conflicting First Law demands.”

“So what do we do?”

“We keep the robots out of it,” said Fredda. “Right now we have kept this very close at this end. You know as well as I do that standard police procedure is to keep this sort of crime as quiet as possible to prevent robots from swarming allover the crime scene. Imagine if all the Three-Law robots working in the Utopia region dropped their current work and headed into the search area. So we keep robots from knowing. Donald is the only robot here who knows about it. At that end, I would assume the Crime Scene robots, the Air Traffic Control robots, and Devray’s personal robots are the only ones who know or could figure out that it was a kidnapping. We need to deactivate all of them, now, immediately, and keep them turned off until all this is over.”

Kresh frowned and started pacing back and forth. “Burning devils of damnation. I hate to say it, but you’re right. You’re absolutely right. You contact Devray-and place the call yourself, manually. Talk directly to him, and make sure no robots can hear. Tell him what you told me. It’s going to be bloody hard to get through these next few days without Donald, but I don’t see that I have any choice. I’ll go to the library and shut him down myself.”

“Right,” said Fredda. A very straightforward plan. As she turned toward the comm screen and set to work placing the call, she wondered if it would all be that easy.

“DONALD?” KRESH CALLED out as he stepped into the library. Odd. Donald should have been standing in the center of the room, waiting. “Donald?” There was no answer. “Donald, where are you?” Still silence. “Donald, I order you to come to me and answer this call.”

Still there was nothing.

But he had given Donald a direct order. A clear, specific, unambiguous order. Nothing could have prevented him from obeying that order except

And then Alvar Kresh cursed himself as a fool. Of course. It was painfully obvious. If they could figure it out, so could Donald. Up to and including the idea of deactivating the robots who knew about the Beddle kidnapping.

And First Law would require Donald to avoid being turned off, if that was the only way to prevent harm to a human being. He was gone. He had run away.

And the devil only knew what Donald had in mind.

18

FREDDA LEVING WONDERED if she had done the right thing, as she readied herself for a much-belated bedtime, and watched her husband climb into bed beside her. The call to Devray hadn’t involved any deep and abiding moral issues, and the fruitless search for Donald had been nothing worse than frustrating. But then there was that second call she had made, the one she did not dare tell Alvar about.