Character says he has anaemia. Pernicious anaemia. And is resigned to his fate.
Engendered some tweets (found by Google - am not a twitterer) out of ignorance, such as this:
Kat Steiner @Kastrel 12 mins12 minutes ago
Wait, what? Since when has pernicious anaemia been terminal? My dad has it! He just has Vit B12 injections #DowntonAbbey
I'd have hoped that a bibliophile might know the meaning of the word "pernicious", if not a full understanding of PA. Well, on the basis of "any publicity is good publicity", probably a good snippet of story.
Also made me wonder if a script-writer or other involved person is a sufferer?