Answer
My favorite episode in Season 1 is Strangeling. I love it so much because it shows a bit of Rick's past with the Celtic Spell book, also it shows how Jack is supposed to become Fi's protector. Every time I watch this episode it makes me wish Season 3 would have played out the way it was supposed to end up. Plus I the Scottish play (Macbeth) is my favorite play that I've ever seen.