Also, I've been wondering if they're going to deviate from the book and not kill Murtagh. After ep. 1, Caitriona was asked on Twitter what became of Murtagh, and she replied that we would hear from him again. And Ron Moore was asked if Murtagh survives, and replied that we'd have to wait and see...

I was thinking that if they did decide not to have him die, what would they do with him? Then I thought that the most likely thing might be to drop the Duncan Innes character (the dude with one arm who ends up marrying Jamie's aunt) and replace him with Murtagh.