Nothing wastes the body like worry

Hours. Klaus wasn't sure how long it had been, but it had been hours, hours since he'd gotten back, hours since he'd started looking for Caroline. People had seen her, she had been back, but no one knew where she was now, and he wouldn't take it. She would not be one of the missing people, not if it took beating his way through every wall in the station to make sure.

He would give it some time, though, a day or two before he got started on that particular plan. At least one plan, because he needed some proper sleep, now that he had eaten enough of what blood the replicators provided. He only fell asleep after a couple more hours, and he fell asleep at his desk, over an unfinished drawing of Caroline.