I do genuinely think Frank prefers to go by Langdon, which is why I unfortunately don't believe we'll get Mel calling him Frank next season. However, I do think it would also be very good if he asked her to drop the Dr and just call him Langdon. Especially because Mel is so formal with everyone's titles, she never calls them by just their name or last name, even 10 months into knowing them. I think it'd be a huge deal to her if he explicitly told her to call him that














