 How did Joe get to 2133?
A gun is an interesting weapon; it can be hired, of course, and naturally doesn't care who hires it. The evening was dark, it was unlikely that the other even saw the circle of steel that was the mouth of the shotgun barrel, now resting on the car's window ledge. And at that moment, the universe caved inward upon Joseph Marie Prantera. There was a falling through all space and through all time. A door slid open in the wall in a way that Joe had never seen a door operate before. The other spoke precisely and slowly, the way a highly educated man speaks a language which he reads and writes fluently but has little occasion to practice vocally. Joe had been born in Naples and his mother had died in childbirth. It opened on his approach, the door sliding back into the wall in much the same manner as the room's door had opened for Reston-Farrell. He looked out, however, not on the lawns and walks of a sanitarium but upon a wide boulevard of what was obviously a populous city. Joe Prantera stared at him, said finally, flatly, "What's it all about?" Two were seated there now, papers, books and soiled coffee cups before them. Reston-Farrell, the one Joe had already met, was tall and drawn of face and with a chainsmoker's nervousness. Whatever the something else was, a slot opened in the middle of the table and a glass, so clear of texture as to be all but invisible, was elevated. "What is the date, Old Calendar?" "2133," Reston-Farrell said. "2133 A.D. they would say." Warren Brett-James said softly, "Mr. Prantera, you are no longer in the year 1960, you are now in the year 2133." Reston-Farrell said, "Suffice to say, you are now one hundred and seventy-three years after the last memory you have." Joe Prantera's mind suddenly reverted to those last memories and his eyes narrowed dangerously. For the second time, Reston-Farrell said, "Where would you go, Mr. Prantera?" I got this straight, you brought me, some screwy way, all the way ... here. I seen what it looks like out that window—" The real comprehension was seeping through to him even as he talked. The two men of the future said nothing more for long minutes while Joe Prantera's mind whirled its confusion. "That is why we brought you here, Mr. Prantera.
 He was transported through time from 1960 to 2133 by Brett-James and Reston-Farrell.
 He was cryogenically frozen in 1960 and awakened in 2133.  He was transported through time from 1960 to 2133 by Brett-James and Reston-Farrell.  Joe fell through a crack in time, which put him in 2133.  Brett-James and Reston-Farrell used a vortex manipulator to transport Joe to 2133.