"Reparametrization invariance of the bosonic string!" Travnicek shouted. Sweat beaded on his forehead. "Preserve the covariant gauge!"

Tachyon's eyes narrowed as he glanced at the printouts. "There are two strains of wild card," Tachyon said. "One old infection, one new."

Modular Man looked at Travnicek in surprise. Probabilities poured through his mind. Travnicek had been a wild card all along. His ability to build Modular Man had been a function of his talent, not native genius.

Tachyon looked at Travnicek. "Can he be awakened from this state?"

"I don't know."

Tachyon leaned over the gurney, looked at Travnicek intently. Mental powers, Modular Man thought.

Travnicek gave a shout and batted the alien's arms away. He sat up and stared.

"It's that fucking Lorelei!" he said. "She's doing this to me, the bitch. Just because I wouldn't tip."

Tachyon looked at him. "Mister, ah…"

Travnicek brandished a finger. "Stop singing when we do it, I said, and maybe I'll tip! Who needs that kind of distraction?"

"Sir," Tachyon said. "We need a list of your contacts over the last few days."

Sweat poured down Travnicek's face. " I haven't seen anyone. I've been in the loft the last three days. Only ate a few slices of pizza from the fridge." His voice rose to a shriek. "It's that Lorelei, I tell you! She's doing it!"

"Are you sure this Lorelei is your only contact?"

"Jesus, yes!" Travnicek held out his hand. His two toes were still in his palm. "Look what the bitch is doing to me!"

"Do you know how to reach her? Where she might be hiding?"

"Shangri-la Outcalls. They're in the book. Just have them send her." Rage entered his eyes. "Five bucks for the taxi!" Finn looked at Tachyon. "Could Croyd have become a female in the last three days?"

"Unlikely, but this remains the only lead we possess. If nothing else, this Lorelei might provide us with a lead to Croyd. Call the Squad. And the police."

"Sir." Finn's hooves rapped daintily on the tile floor as he left the curtained area. Tachyon's attention returned to Travnicek. "Have you a wild card history?" he asked. "Any manifestations?"

"Of course not." Travnicek reached for his bare foot, then jerked his hand back. " I have no feeling in my toes. Goddamn it!"

"The reason I asked, sir-this is your second dose of wild card. You have a previous infection."

Travnicek's head snapped up. Sweat sprayed over Tachyon's coat. "What the hell do you mean, previous infection? I've had nothing of the sort."

"It would appear that you have. Your gene structure has been thoroughly infiltrated by the virus."

"I've never been sick in my life, you fucking quack."

"Sir," the android interrupted. "You have unusual abilities. Involving… reparametrization invariance of the bosonic string?"

Travnicek looked at him for a long moment. Then comprehension dawned, followed by horror.

"My God," he said.

"Sir," said Tachyon. "There is a serum. It has a twenty percent chance of success."

Travnicek continued to stare at the android. "Success," he said. "That means both infections go, right?"

"Yes. If it works at all. But there is a risk…"

Hooves tapped on the floor. Finn appeared through the curtains. "All set, Doc." He carried a case, which he opened. Bottles and hypodermics were revealed. "I've brought the serum. Also the release forms."

Travnicek appeared to notice the centaur for the first time. He shrank away. "Get away from me, you freak!" Finn seemed embarrassed. Tachyon's face hardened, and he drew himself up. Angry hauteur burned in his face. "Dr. Finn is in charge here. He is a licensed physician-"

"I don't care if he's licensed to pull carriages in Central Park! A joker is doing this to me, and I'm not having a joker treat me!" Travnicek hesitated and looked at the toes in his hand. Decision entered his eyes. He flung the toes to the ground. "In fact, I'm not taking the fucking serum at all." He looked at the android. "Get me out of here. Now."

"Yes, sir." Dismay wafted through the android. He was not constructed so as to be able to refuse a direct command from his creator. He picked up Travnicek in his arms and rose into the air. Tachyon watched, arms folded in frozen, implacable hostility.

"Wait!" Finn's tone was desperate. "We need you to sign a release that you refused treatment!"

"Piss off!" barked Travnicek. Modular Man floated above the screens separating the E-room beds and began moving toward the entrance. A gray-faced joker child, waiting to have a splinter removed from his knee, stared upward with blank silver eyeballs. Finn followed, waving his forms and a pencil. "Sir! I at least need your name!"

Modular Man butted through the swinging doors leading to the E-room and then past a surprised, green, seven-foot joker to the street door. Once outside he accelerated.

"After we get home," Travnicek said, "I want you to find Lorelei. Bring her to the loft and we'll make her turn off her wild card."

People on the night streets stared up as the android and his burden flew overhead. Half of them were wearing gauze masks. Modular Man's feeling of dismay intensified. "This is a viral infection, sir," he said. " I don't believe anyone is doing this to you."

"Jesus fucking Christ!" Travnicek slapped his forehead. "The two sons of bitches in the hallway! I forgot about them!" He grinned. "It's not the chippie after all. When I went downstairs to call Lorelei on the pay phone in the downstairs hall, I ran into these two guys coming up the stairs. I bumped into one of them in the hall. They went into the apartment right under us. One of them must be this Croyd guy."

"Was one an albino?"

"I didn't pay attention to them. They were wearing those surgical mask things anyway." He grew excited. "One of them was wearing dark glasses! And in a dark corridor! He must have been hiding his pink eyes!"

They had arrived at Travnicek's building. The android flew down the alley, circled into the airshaft, and rose to the building's flat roof. He opened the skylight and lowered Travnicek carefully through it. As he set Travnicek on his feet, he observed that two of the man's remaining toes were set at an odd angle.

Travnicek, oblivious to this fact, cackled as he paced back and forth. "I thought there was a joker in that apartment," he said. " I ran into one once on the stairs. All I cared about was that he didn't complain to the landlord about noise from the flux generators." One of his toes, cast adrift, rolled under a table. "He's right below," he said. "He's been doing this to me, and now the bastard is going to pay."

"He may not be able to control it," the android said. He was looking at the place where the toe had vanished, wondering if he should retrieve it. "He may not be able to reverse things."

Travnicek swung around. Sweat was pouring down his face. His eyes were fevered. "He's going to stop what he's doing," he shouted, "or he's going to die!" His voice rose to a shriek. "I am not going to be a joker! I am a genius, and I intend to stay one! Find the bastard and bring him here!"

"Yes, sir." Resigned, the android stepped to the metal locker where his spare parts were kept. He twirled the combination knob, opened the door, and saw that the two grenade launchers were missing. Apparently he'd loaded one with sleep gas and the other with smoke grenades, and they'd been destroyed at Aces High. That left the dazzler, the 20mm cannon, and the microwave laser.

Croyd, he thought, had already destroyed him once.

He opened the zips on the shoulders of his jumpsuit and willed open the slots on his shoulders. He took the cannon and the laser and fixed them in place. The cannon was almost as tall as he was and heavy; he wove software patterns that compensated his balance accordingly. A drum of 20mm rounds was attached to the cannon. The bolt slammed back and forward and the first round was chambered.