"Yes," he said. Because the alternative was death now -- and for certain. At least this way he had a chance, slim as it was.

"You present yourself at our main barracks in New York," the voice of the Interplan cop resumed. "At 580 Fifth Avenue, floor twelve. Once you've surrendered yourself, we'll have our psychiatrists begin on you; we'll have personality-profile tests made. We'll attempt to determine your absolute, ultimate fantasy wish -- then we'll bring you back to Rekal, Incorporated, here; get them in on it, fulfilling that wish in vicarious surrogate retrospec­tion. And -- good luck. We do owe you something; you acted as a capable instrument for us." The voice lacked malice; if anything, they -- the organization -- felt sympathy toward him.

"Thanks," Quail said. And began searching for a robot cab.

"Mr. Quail," the stern-faced, elderly Interplan psychiatrist said, "you possess a most interesting wish-fulfillment dream fantasy. Probably nothing such as you consciously entertain or suppose. This is commonly the way; I hope it won't upset you too much to hear about it."

The senior ranking Interplan officer present said briskly, "He better not be too much upset to hear about it, not if he expects not to get shot."

"Unlike the fantasy of wanting to be an Interplan undercover agent," the psychiatrist continued, "which, being relatively speaking a product of matu­rity, had a certain plausibility to it, this production is a grotesque dream of your childhood; it is no wonder you fail to recall it. Your fantasy is this: you are nine years old, walking alone down a rustic lane. An unfamiliar variety of space vessel from another star system lands directly in front of you. No one on Earth but you, Mr. Quail, sees it. The creatures within are very small and helpless, somewhat on the order of field mice, although they are attempting to invade Earth; tens of thousands of other ships will soon be on their way, when this advance party gives the go-ahead signal."

"And I suppose I stop them," Quail said, experiencing a mixture of amusement and disgust. "Single-handed I wipe them out. Probably by step­ping on them with my foot."

"No," the psychiatrist said patiently. "You halt the invasion, but not by destroying them. Instead, you show them kindness and mercy, even though by telepathy -- their mode of communication -- you know why they have come. They have never seen such humane traits exhibited by any sentient organism, and to show their appreciation they make a covenant with you."

Quail said, "They won't invade Earth as long as I'm alive."

"Exactly." To the Interplan officer the psychiatrist said, "You can see it does fit his personality, despite his feigned scorn."

"So by merely existing," Quail said, feeling a growing pleasure, "by simply being alive, I keep Earth safe from alien rule. I'm in effect, then, the most important person on Terra. Without lifting a finger."

"Yes, indeed, sir," the psychiatrist said. "And this is bedrock in your psyche; this is a life-long childhood fantasy. Which, without depth and drug therapy, you never would have recalled. But it has always existed in you; it went underneath, but never ceased."

To McClane, who sat intently listening, the senior police official said, "Can you implant an extra-factual memory pattern that extreme in him?"

"We get handed every possible type of wish-fantasy there is," McClane said. "Frankly, I've heard a lot worse than this. Certainly we can handle it. Twenty-four hours from now he won't just wish he'd saved Earth; he'll devoutly believe it really happened."

The senior police official said, "You can start the job, then. In preparation we've already once again erased the memory in him of his trip to Mars."

Quail said, "What trip to Mars?"

No one answered him, so reluctantly, he shelved the question. And any­how a police vehicle had now put in its appearance; he, McClane and the senior police officer crowded into it, and presently they were on their way to Chicago and Rekal, Incorporated.

"You had better make no errors this time," the police officer said to heavy-set, nervous-looking McClane.

"I can't see what could go wrong," McClane mumbled, perspiring. "This has nothing to do with Mars or Interplan. Single-handedly stopping an invasion of Earth from another star-system." He shook his head at that. "Wow, what a kid dreams up. And by pious virtue, too; not by force. It's sort of quaint." He dabbed at his forehead with a large linen pocket handkerchief.

Nobody said anything.

"In fact," McClane said, "it's touching."

"But arrogant," the police official said starkly. "Inasmuch as when he dies the invasion will resume. No wonder he doesn't recall it; it's the most grandi­ose fantasy I ever ran across." He eyed Quail with disapproval. "And to think we put this man on our payroll."

When they reached Rekal, Incorporated the receptionist, Shirley, met them breathlessly in the outer office. "Welcome back, Mr. Quail," she flut­tered, her melon-shaped breasts -- today painted an incandescent orange -- bobbing with agitation. "I'm sorry everything worked out so badly before; I'm sure this time it'll go better."

Still repeatedly dabbing at his shiny forehead with his neatly folded Irish linen handkerchief, McClane said, "It better." Moving with rapidity he rounded up Lowe and Keeler, escorted them and Douglas Quail to the work area, and then, with Shirley and the senior police officer, returned to his familiar office. To wait.

"Do we have a packet made up for this, Mr. McClane?" Shirley asked, bumping against him in her agitation, then coloring modestly.

"I think we do." He tried to recall, then gave up and consulted the formal chart. "A combination," he decided aloud, "of packets Eighty-one, Twenty, and Six." From the vault section of the chamber behind his desk he fished out the appropriate packets, carried them to his desk for inspection. "From Eight-one," he explained, "a magic healing rod given him -- the client in question, this time Mr. Quail -- by the race of beings from another system. A token of their gratitude."

"Does it work?" the police officer asked curiously.

"It did once," McClane explained. "But he, ahem, you see, used it up years ago, healing right and left. Now it's only a memento. But he remembers it working spectacularly." He chuckled, then opened packet Twenty. "Docu­ment from the UN Secretary General thanking him for saving Earth; this isn't precisely appropriate, because part of Quail's fantasy is that no one knows of the invasion except himself, but for the sake of verisimilitude we'll throw it in." He inspected packet Six, then. What came from this? He couldn't recall; frowning, he dug into the plastic bag as Shirley and the Interplan olice officer watched intently.

"Writing," Shirley said. "In a funny language."

"This tells who they were," McClane said, "and where they came from. Including a detailed star map logging their flight here and the system of ori­gin. Of course it's in their script, so he can't read it. But he remembers them reading it to him in his own tongue." He placed the three artifacts in the center of the desk. "These should be taken to Quail's conapt," he said to the police officer. "So that when he gets home he'll find them. And it'll confirm his fantasy. SOP -- standard operating procedure." He chuckled apprehen­sively, wondering how matters were going with Lowe and Keeler.

The intercom buzzed. "Mr. McClane, I'm sorry to bother you." It was Lowe's voice; he froze as he recognized it, froze and became mute. "But something's come up. Maybe it would be better if you came in here and supervised. Like before, Quail reacted well to the narkidrine; he's uncon­scious, relaxed and receptive. But --" McClane sprinted for the work area.

On a hygienic bed Douglas Quail lay breathing slowly and regularly, eyes half-shut, dimly conscious of those around him.