Sarah and The Doctor in “School Reunion”

Sarah

It's daft, but I haven't ever thanked you for that time, and like I said, I wouldn't have missed it for the world.

Something to tell the grandkids.

Sarah

Oh, I think it'll be someone else's grandkids now.

Right. Yes, sorry. I didn't get a chance to ask. You haven't... There hasn't been anyone? You know...?

Sarah

Well, there was this one guy. I traveled with him for a while. But he was a tough act to follow. [Sarah and the Doctor laugh] Goodbye, Doctor.

Oh, it's not goodbye—

Sarah

Say it, please. This time. Say it.

Goodbye... my Sarah Jane!