Remembered another one. Spike's opening line is about crucifixion: "If every vampire who said he was at the crucifixion was actually there, it would have been like Woodstock!" The theme lies dormant till FFL where we get this image



as well as a scene in which Drusilla "makes" him in a place that looks like a manger. And then of course there are a lot of crucifixion references in Intervention, Beneath You and Chosen.