"Eight." Ianto shrugged. "The first time it took me a week to find the way back out. It's easier after that. But I still don't know how I got here the first time. It wasn't a door that time. At least, not a door that was where no door should be. But I don't know how other people got here, or how they get back. If they do it consciously or not. Especially that first time." He studied Jack a moment. "How did you get here? To this isolated dimension?"