It'll be a while yet before Doc can unlearn his 'darling's and 'son's. It may be unlikely that he would be able to drop those terms completely.

"Bah. Don't tell me that, Raylan," Doc whines, giving Raylan a friendly elbow nudge. Sometimes it's better not to know that they missed out on a cure by a hundred years. He would have given anything if he could have saved his mother.

Sometimes Raylan reminds him too much of himself. It has him falling quiet, musing their mortality, the way they have lived their lives, the choices they had made.

"It's gonna happen one day. That still how you wanna go when you're eighty? And what about your- your ex and your little one?"