The writer confirmed that Davies initially reached out to ask for his help because he was struggling to fit in time to write a 2024 Christmas special before moving on to next year's full season.

Unfortunately, Moffat didn't tell Radio Times whether I should have some tissues ready before this episode. That said, we did ...

Played by Valentine Dyall, whose likeness is on the shirt, he first appeared on the show in 1978 during Tom Baker's stint as ...