Interesting how "Wicker Man" thread evokes mentions of Waugh and Brideshead Revisited. I was very eager to see BR when it came out as I'd just completed my first reading of it, and the roster of actors for it was formidable, but when it was aired I was in school.

Brideshead Revisited is one of the three "Christian" themed works which I have found very moving. My mother once mentioned that the author Chaim Potok mentioned it as an influence in his work. The other two outstanding Christian themed works for me are: Dostoyevsky's Brothers Karamazov and William Miller's A Canticle for Leibowitz. I have not checked out if a movie has ever been made for BK, but New Hampshire Public Radio did a creditable radioplay version of Canticle.
Recently I read an interesting little book which may join my Christian Trilogy, or, more better stated, turn my trilogy to a quadrangle: Master And Margarita by Bulgakov.