Sulu wasn't about to judge Ianto for drinking; he knew that things weren't as good as maybe he'd hoped they would be, and he knew that the party - well. It was a chance to see someone who'd died, and that was good and bad.

He paused at the question, though, honestly trying to remember. It had been a long time since they'd gone through the archives - he mentally reeled a little at just how long ago it seemed - and he had to think about it before he remembered. "Yeah, I remember you showing me that. It... brought people back after they'd died, but just for a few minutes, right?"