"I'll call you if I think of anything else," Hopper says, waving his hand at Klaus in a gesture that could feel dismissive if not for the way he's looking at him. There's concern in his expression, in the way he watches how Klaus levers himself to his feet in obvious pain.

"Take care of yourself, kid," he says. "And next time, call for some damn backup. You've got my direct line."

He'll be there. Day or night.