Hi! I was wondering if anyone know what instrument was used in the Sanctuary theme songs? Both the opening theme from the first two and the last two seasons. I know the instalments are different, but I can't figure out either.

I've been trying to figure out what the main instrument is in the opening theme for the 3 and 4 season for years! I love the way it sounds. Really haunting. But after all this time, I've come no closer to figuring it out and it's driving me crazy! Does anyone know? Any ideas?