I was planning on stocking up on Kleenex before Wednesday’s Doctor Who Christmas special, when we say goodbye to Matt Smith‘s Doctor, and of course the farewell special that precedes it, but I didn’t know I’d need it for the featurettes that BBC America is releasing ahead of time.

This is a very sweet, and maybe bittersweet, featurette of a discussion between 10th Doctor (it’s easier to go by the traditional numbering until we know more) David Tennant and 11th Doctor Matt Smith, about leaving the gig:

Featurette: Doctor Who – Insider: Matt Smith & David Tennant on Regeneration and Saying Goodbye

Doctor Who: Farewell to Matt Smith premieres Wednesday, December 25 at 8/7c on BBC America.

The Doctor Who Christmas special, Doctor Who: The Time of the Doctor, starring Matt Smith and Jenna Coleman, premieres Wednesday, December 25 at 9/8c on BBC America.