JC and Happy wandered the length of the southbound platform, looking about them, taking their time. They didn’t know what they were looking for; only that they’d know it when they saw it. The sound of their footsteps was strangely muffled, hardly echoing at all in the quiet. And yet it all seemed normal enough. The huge posters on the walls advertised recent and forthcoming movies, along with all the usual ads for expensive products and services, and even the descending list of destinations on the far wall seemed reassuringly sane and definite. The two men stopped at the end of the platform and peered dubiously into the great dark maw of the tunnel-mouth; but nothing looked back.

“I don’t see anyone,” said JC. “Can’t say I feel anything much, either.”

“Feel the air,” said Happy. “It’s colder than it should be, and . . . brittle. I’m getting a definite feeling of anticipation. Of something about to happen. And even though lights are still on . . . doesn’t it still feel dark, to you?”

“Go on,” said JC. “What else?”

“Eyes,” said Happy. “A constant feeling of being observed, by unseen eyes. Not human. Nature . . . unknown. But I can feel them, digging into my back. Whatever it is that’s down here, that terrified and traumatised all those people . . . it knows we’re here.”

“Good,” JC said briskly. “At least now we can be sure we’re not down here on a wild ghost chase. Melody? Do you have anything interesting to tell us yet?”

“Don’t shout! I can hear you perfectly.” Melody concentrated on what her instrument panels were telling her, not even glancing round at JC and Happy. “Short- and long-range sensors are all on-line and reporting in, but so far all they’re giving me is a headache. Information’s coming in faster than the computers can deal with it, and none of it makes any sense. I’m getting readings all across the board: temperature spikes, radiation surges, electromagnetic fluctuations I would have said were impossible under normal conditions; and a whole bunch of weird energy signatures are popping up all over the place.”

“Purpose?” said JC.

“Beats the hell out of me,” said Melody, stabbing viciously at various keyboards with both hands. “I’m getting definite indications of Time shifts. Intrusions from the Past. Some recent, some not. And underneath all that . . . I’m reading Deep Time, JC. From long before this station even existed. This is bad, JC, seriously bad. I’ve never seen so many extreme readings in one place before.”

“Go on,” JC urged. “Throw caution to the winds and give me your best guess as to what’s happening here.”