Sully is the smartest man Nate knows, but that doesn't mean he doesn't need his help. He'll deny it until his last breath but maybe Elena was right, maybe he shouldn't still be dragging Sully around the world with him. He was older than Nate is now when he met him 20 years ago, and he's still gallivanting around after treasure because Nate doesn't know how to say no.

"He's smart," he says, nodding. Sully taught him everything he knew, and Nate doesn't like to think about where he'd be without him. "But he's getting on, y'know?" he says it on a laugh, a little awkward. Sully still has more life in him than some teenagers Nate knows, but he can't deny that it must be starting to take its toll. "He's the only father I know." That's maybe a little more personal than he wanted to get, but he needs to explain, and maybe he's still a little dazed.