Lewis and Endeavour: The Mortmain Connection
I have just watched the Lewis episode about the English Civil War re-enactors, set on the Mortmain estate where Hathaway's father had been estate manager.
Then I remembered the "Endeavour" episode where they have dealings on the Mortmain estate, and encounter a young chap called Hathaway. And I'm thinking "he can't be James Hathaway; could it be his dad, or just a coincidence of names?" Then it turns out he is Hathaway Senior in his youth.
(I was also reminded a bit of Brideshead Revisited, with James as a sort of Charles Ryder, returning to the splendid Catholic mansion of his youth, with Scarlett as a sort of Julia).
I enjoy such cross-references between Morse, Lewis and Endeavour.