As Ryuuzaki handed out information for other patients, Castiel took another sheet of paper out of his coat and recorded the information. "Figaro" should find him what he needed, seeing how it wasn't a name he'd heard of before, but Earth was another problem entirely.

"I'll need more specifics about that Earth. We won't be able to narrow down the search otherwise," Castiel clarified. The names of the patients themselves might not be enough, as those details weren't always included.

The possibility that those who were brainwashed might not be saved was one that Castiel took issue with, though. It wasn't like him to blindly believe in anything, except the Winchesters had rubbed off on in him in certain ways -- and more than that, if he wasn't able to retrieve Sam and Dean, then what was all this work for?

Instead of insisting it would be fine, though, he kept that thought to himself. Ryuuzaki struck him very much as a realist.