Speaking of, at least a couple of times they're mentioned AS 'the Ponds' like a complete unit. I only really have a layman's grasp of Dr. Who, so I'm guessing they're married in some way? Even if no one else really knows it?

Also:

"If she starts - " SUSTAINED TRAIN WHISTLE " - worry, it's
perfectly normal!"

"I'm always going to wonder now," Utena observed matter-of-
factly in the quiet that settled once the train was gone.

If she what exactly?! Dammit, now I'm always gonna wonder myself :(