Derec stared at her in a kind of resigned worry as she entered another displaced memory episode. This one must be from the last time Hunters had tracked them down and captured them, when they had tried to run away through the maze of underground conduits in the city. The vacuum tube hadn’t worked any better.

He ached allover. Having the Hunter carry him was almost a relief after the effort to escape. Ariel was squirming and protesting in the grasp of the other Hunter, but she had no idea of where she was or what was happening now. He closed his eyes and tried to relax.

The Hunters only rode the slidewalks a short distance. They were soon intercepted by a large function robot in the shape of a transport truck. The Hunters mounted the open back of the truck, still carrying Derec and Ariel.

The switch to the truck woke Derec up, and he watched the city pass by as they rode. Ariel was now silent, her eyes closed. The city streets seemed depopulated to him, at least compared to what he remembered from their previous visit to Robot City. Maybe, he thought, the city had expanded faster than the robot population, causing the robots to spread themselves thinner over the whole planet.

He glanced at Ariel periodically with growing concern. Her episodes seemed to occur more frequently under stress. That might mean she was getting worse, not better.

The truck stopped several times to pick up other Hunters from the slidewalks. Now that the search was over, they would probably be taken to a storage area or something. They were all unusually tall for humanoid robots, with expansive torsos. Narrow benches molded from the truck bed itself provided seats for all of them along the side walls. They sat with their knees drawn up and their waists level with the top of the walls, watching Derec and Ariel without a word spoken.

The truck slowed down as it approached one more lone Hunter on a slidewalk. Two familiar shapes caught Derec’s eye in the distance, and he stiffened.

“Ariel,” he said quietly.

She didn’t answer.

He glanced over his shoulder at Mandelbrot, who was standing on the stationary shoulder of the slidewalk just a few meters away. Wolruf had been with him a moment ago, but was now out of sight. The Hunter was climbing into the back of the truck, making a total of six. Derec reached over and shook Ariel’s limp arm.

“Ariel.”

She opened her eyes and looked at him, still partly disoriented. “What? Derec, where are we?”

It was too late to get off the truck, even if the Hunters could be distracted somehow. The last Hunter was on board and the truck started up. Then the engine began a high, irregular whine and the truck coasted back to a stop.

The Hunters remained motionless for a short time. Then Mandelbrot stepped forward. Derec was certain that they were all communicating through their comlinks.

“What’s going on?” Ariel whispered.

“I’m not sure.”

Mandelbrot suddenly climbed onto the front of the truck and sat down. Derec had trouble seeing what he was doing, but a minute later the truck began to move forward, Hunters and all. Apparently Wolruf had sabotaged the function-robot brain and Mandelbrot had successfully volunteered to operate a manual override. Derec hoped Wolruf was safe, wherever she was-most likely under the truck and hanging on precariously.

By now, Ariel had also recognized Mandelbrot. She and Derec exchanged puzzled glances, still in the firm grip of the silent Hunters who had taken custody of them. They watched the Hunters carefully as the truck picked up speed and rolled along, but the robots seemed perfectly content with the situation.

Soon Mandelbrot had the truck up to a considerable velocity, much faster than the truck had driven itself. The Hunters gripped the sides of the truck to stabilize themselves. Derec did not feel any loosening of the hold on him, however.

Mandelbrot was going to try something to free them. Derec tensed himself in anticipation.

He was not too surprised when the truck suddenly took a sharp left that sent everyone in the back sprawling. With a hard, painful yank, he wrenched himself free of the Hunter holding him, knelt on the bed of the truck, and got leverage under the robot. He gave a heave and flipped the Hunter clean out of the truck.

Next to him, Ariel had almost pulled free of the Hunter holding her before it regained its balance. All of them leaped to their feet to restore order, but Derec shouldered another Hunter into the one grappling with Ariel. The truck took another sharp turn and all the Hunters stumbled again. Derec watched for anyone to become overbalanced toward the edge of the truck bed and managed to shove another one out of the truck.

Their massive size and great strength had become a liability on the unstable truck bed.

The vehicle came to a sudden, screeching, careening halt that threw everyone in the back forward. Mandelbrot, who had been braced for the stop, leaped into the back of the truck and hoisted out another Hunter who was still in the act of standing up again. Mandelbrot rolled one more out on top of that one and then pulled Derec free of the one grappling with him.

Mandelbrot’s great advantage became clear to Derec. The first priority programmed into the Hunters was to find and detain the two humans. The First Law’s demand that they not harm the humans overrode the Third Law’s requirement that they protect themselves.

While the remaining two Hunters grappled with Derec and Ariel, Mandelbrot was able to get the right leverage under each Hunter and lift them out of the truck.

“Hang on,” Mandelbrot called out in a remarkably calm voice. He jumped back to the manual console in the front and drove off.

Derec fell back on the bed of the truck, gritting his teeth in pain but relieved that they had escaped. Ariel scooted over to him and sat down, her hair blowing in the breeze.

She smiled faintly. “That was close. How did they-”

“Look out!” He shouted.

Behind her, over her head, one of the Hunters was climbing up the side of the moving truck, where it had gotten hold before the truck had started again. Derec tried to stand, but the pain in his legs was too great. His feet slipped and he fell back again.

The Hunter was just climbing over the side when it suddenly vanished from sight and hit the street with a crash.

Then Wolruf’s head appeared over the side with her caninoid grin. “Hunterr poorly balanced,” she said, climbing over the side.

Ariel jumped up to help her over.

Mandelbrot turned another corner on the city street, then another. After speeding quickly down another block and taking one more turn, he came to a stop, a smooth one this time.

“What is it?” Derec called, but he was too uncomfortable to get up. “Ariel, find out what’s going on.”

“Mandelbrot?” Ariel said, standing.

Derec could hear both their voices.

“This vehicle has a comlink that must be fully disconnected,” said Mandelbrot. “Wolruf successfully disconnected the function-robot brain from the truck controls, but it still works, and the central computer may be able to locate our position through it. However, as soon as I finish disabling it… There.”

Derec heard a heavy object hit the pavement alongside the truck.

“The truck is now comlink invisible,” said Mandelbrot. “We cannot be tracked through it. We are free to move about.” He sat down at the console again and drove off.

Derec let out a long sigh.