This might sound like I'm nit-picking, but I found it very annoying when Nathan said the Native Americans had a legend about someone who could wear someone else's skin called a Skin Walker. Yes, Skin Walkers are from Native American legend, but they turned into animals, not other people.
If they wanted to make wearing other people's skin her "trouble," that's fine, but why erroneously equate it with an actual legend? Don't the people who work on these shows have researchers to prevent stupid mistakes like that? Don't they know how to use Google, for that matter?