Captain: One thing you could possibly do for me, if you were very kind?

First Doctor: Oh, anything. Name it.

Captain: My family. Perhaps you could look in on them, from time to time?

First Doctor: We should be delighted. What’s the name?

Captain: Lethbridge-Stewart. Captain Archibald Hamish Lethbridge-Stewart.

First Doctor: I shall make it my business.

Twelfth Doctor: You can trust him on that.

From Doctor Who – Season 11 Episode 0: ‘Twice Upon a Time’ (11×00 / Christmas special 2017)