The silver chest had travelled all the way across the water. Alex saw it swinging gently over the submarine. Inside the control cabin, Conrad leaned forward. Slowly he lowered the chest until it landed on the metal surface. The wires and chains attached to the hoist sagged, then straightened again. The hoist began to move back towards the quay. But it had left the bomb behind.

Something was definitely happening inside the handcuffs. Alex heard a very faint hissing. The pink gum was expanding. It was oozing back out of the lock and there was much more gum coming out than he had put in. There was a sudden crack. The metal had shattered. Alex felt a painful sting as a piece of broken metal cut into his wrist. But then the handcuffs fell open. He was free!

Conrad had seen what had happened. He was already climbing out of the crane. He hadn’t turned off the controls and the magnet was still coming back on its own, just a few metres above the water. The bomb was out of reach on the other side. Even as Alex looked around for a weapon, Conrad reached the bottom of the ladder and rushed towards him. Suddenly they were face to face.

Conrad smiled. The smile tugged at the one side of his face that could move. The other side, with the bald scalp above it, remained still. Alex could see at once that, despite all his terrible injuries, Conrad was utterly confident. A moment later, he knew why. Fired by hatred, Conrad moved with surprising speed. He was standing in combat stance one moment, a blur the next. Alex felt a foot kick him in the chest. The world spun and he was thrown to the ground, winded and bruised. Meanwhile, Conrad had landed lightly on his feet. He wasn’t even out of breath.

Painfully, Alex picked himself up. Conrad walked towards him and lashed out a second time. His foot missed by a centimetre as Alex dived back to the ground, rolling over and over to the water’s edge. A hand reached out and grabbed hold of his shirt. Alex saw the dreadful stitch-marks where the hand had been sewn back onto the wrist. He was dragged to his feet. Conrad slapped him with tremendous force. Alex tasted blood. The hand released him. He stood, swaying, trying to find some sort of defence.

But he had none. For all his strength and skill, Conrad had beaten him. And now he was coming in for the kill. Alex saw it in his face…

And then, out of nowhere, came a sudden clanging. The alarm bell had started up again. There was a burst of gunfire and, seconds later, an explosion. Someone had thrown another grenade. Conrad stopped dead in his tracks, his head twisting round. There was more gunfire. Impossible though it was, it seemed that the harbour was under attack.

With new strength, Alex ran forward. He had seen a metal rod lying on the ground amongst all the other debris. His hands closed around it and he swept it up, grateful to have something that felt like a weapon in his hands. Conrad turned to face him. The shooting had intensified. Now it seemed to be coming from two directions as Sarov’s men defended themselves against an enemy that had come from nowhere. There was a screech of tyres, and in the far distance Alex saw a jeep come smashing through one of the chicken wire fences. It skidded to a halt and three men jumped out and took cover. They were all dressed in blue. What was going on here? The Russian navy against the Russian army? And who, exactly, had raised the alarm?

But even if Sarov’s plans had been revealed, even if a rescue operation had somehow been put in place, Alex was still in grave danger. Conrad was on the balls of his feet, looking to find a way past the metal rod. And what about the nuclear bomb? Alex didn’t know if Sarov had primed it to go off in five hours or five minutes. Knowing how mad he was, it could have been either.

Conrad leapt forward. Alex lunged with the metal pole and felt it ram into the man’s shoulder. But his smile of satisfaction vanished as Conrad grabbed hold of the rod with both hands. He had allowed Alex to hit him simply because that would bring the rod within his reach. Alex pulled back, but Conrad was much too strong for him. He felt the metal being torn out of his hands, cutting into his palms. Alex let go of the rod, then cried out as Conrad swung it viciously like a scythe. The metal slammed into the side of Alex’s leg and he was down again, on his back, unable to move.

More gunfire. Although his vision was dimmed, Alex saw two more grenades arc through the air. They landed next to one of the ships and exploded, a huge fireball of flame. Two of Sarov’s men were lifted into the air. Two or even three machine-guns began to chatter simultaneously. There were screams. More flames.

Conrad stood over him.

He seemed to have forgotten what was happening in the shipyard. Or perhaps he didn’t care. He pulled up one sleeve, then the other. Finally he dropped down so that he was sitting on Alex’s chest, one knee on either side. His hands closed around Alex’s throat.

Gently, enjoying what he was doing, he began to squeeze.

Alex felt himself being slowly strangled. He couldn’t breathe. There were already black spots in front of his eyes. But he had seen something that Conrad hadn’t. It was slowly making its way back towards them, crossing the water. The magnetic disc.

Conrad had left the controls on in the cabin in his haste to get over to Alex. Was it possible…? Alex remembered what Sarov had told him about his assistant. He had metal pins all over his body. There were metal wires in his jaw and a metal plate in his head…

The magnet was almost over them, blotting out the sky. Alex couldn’t breathe. Conrad’s hands were tight around his throat. He had only seconds left.

With the last of his strength, he suddenly lashed out with both his fists, at the same time jerking his body up. Conrad was taken by surprise. He started back, his hands loosening. The magnet was right above him. Alex saw the shock in his face as all the metal plates, pins and wires in his body entered the magnetic field. Conrad yelled and disappeared, plucked into the air by invisible hands. His back smashed into the disc with a terrible snapping sound. At once he went still, attached to the disc by his shoulders, his arms and legs hanging down.

The crane continued moving, carrying the limp body in a gentle curve over the quay.

Alex gasped for breath. The world swam back into focus. “What an attractive man,” he muttered.

Slowly, he pulled himself to his feet, then staggered over to the handrail where he had been chained. He propped himself against it, no longer able to stand without its support. There was a burst of gunfire, longer and more powerful than any that had gone before. A helicopter had appeared, flying in low over the sea. He saw an airman sitting in the open doorway, his legs dangling, a huge gun cradled in his lap. One of Sarov’s trucks was blown off its wheels, twisted over twice and exploded in flames.

The bomb…

Alex could work out what was happening here later. Nobody would be safe until the bomb was defused. His throat was still burning. It took all his strength to draw breath. But now he ran forward and climbed into the crane. He had operated a crane before. He knew it couldn’t be too difficult. He reached out and took the controls. At the same moment, one of Sarov’s men fired at him. The bullet clanged against the metal casing of the cabin. Alex ducked instinctively and pulled a lever.

The magnetic disc stopped and swung in the air with Conrad stuck beneath it like a broken doll. Alex pushed forward and it began to drop down into the sea. No! That wasn’t what he wanted. He pulled the lever back and it stopped abruptly. How did you turn off the magnet? Alex looked around him and saw a switch. He pressed it. A light came on over his head. Wrong switch! There was a button set in the control stick he was holding and he tried that. At once, Conrad fell free. He plunged into the grey, freezing water and sank immediately. With all the metal inside him, Alex thought, it was hardly surprising.