roll stopped and floated, bringing some of it back to where it could bump into the passengers. Kirk saw a tricorder heading toward him, and wondered who hadnât secured it.
âItâs been a hell of a long time since Iâve been airsick,â McCoy said through clenched teeth. âBut this trip just might do it.â
Kirk glanced over at Spock. Through his helmet, the Vulcanâs flesh looked pale, his lips were clamped shut, his eyebrows arched.
â. . . Kirk  . . . read me? â Scottyâs voice demanded. Most of the transmission was lost to static.
âScotty!â Kirk called. âWeâre experiencing some . . . turbulence. But the shuttleâs intact and weâre okay.â
â. . . cap  . . . jector  . . .â
âNever mind that, Jim,â McCoy said. âHe canât hear you and we canât hear him.â
The doctor was right. And Kirk had other things to worry about. The shuttleâs interior lights flickered twice, then blinked out. At the same instant, the gentlebackground hum of its climate control system stilled. With it, the voices of the passengers went quiet.
âAll systems are down, Captain,â Bunker said. âWeâre dead in the water.â
Everybody had an environmental suit on, so their temperature and oxygen needs would be met for a whileâif those systems continued to work. If not . . . then coming into the dimensional fold was the mistake that many had believed it would be.
âWe are on our own,â Spock said. âWe cannot reach Mister Scott, nor can we warn the second shuttle to turn around.â
âFull speed ahead,â Kirk said. Then he thought better of his response. âThere must be a way to fix this.â
â âFixingâ it is beyond our capabilities,â Spock said. âThe most we can do is hang on and hope.â
âHope?â McCoy echoed. âThatâs the best youâve got?â
âIt is the only option available to us at the moment, Doctor.â
âBeing upset with each other isnât going to help,â Kirk said. âAnd itâll use up your oxygen faster.â
âI know, Jim,â McCoy said. âSorry, Spock.â
âNo apology is required.â
âOh, for Peteâs sake, youââ
McCoy stopped in the middle of his sentence, because the shuttle shook as if it had just run into something solid. At the same instant, the interior lights returned, exceptâ reversed was the only way Kirk could conceptualize it, like a negative image froman old photographic process. The light being emitted from the fixtures was black, the deepest shadows pure white. Every other surface was a shade of gray: light ones darker and dark ones lighter.
And the shuttle began a reverse of its earlier roll. Halfway through, the artificial gravity kicked in. Floating objects began to fall toward the overhead. Kirk recognized the tricorder, and realized it was in the exact same position he had seen it before. The odds against that happening were astronomical, unlessâ
The captain glanced at Bones and Spock. They were in precisely the same positions they had been before, their facial expressions identical. Even he was gripping the console in the exact same way.
This was not like the earlier roll, in the opposite directionâthis was the earlier roll, in reverse. They were reliving the moment, backward, with the only difference being his awareness of it.
It couldnât be happening.
Butâunless a lack of oxygen was causing him to hallucinateâit was.
When the roll was finished, the lighting returned to normal, much to Kirkâs relief. Nearly everyone spoke at once, and Scottyâs voice blared from the speakers, still cut by static but not as completely obscured as before. â canna read you, shut  . . . tain, are you