This discussion may contain spoilers!
In episode 4, Snow said "I have other matters to attend to." just like Crane in episode 2! I'm starting to question everything! Even more evidence, Snow changed from her tan shirt and blue skirt to a black shirt and a black skirt. In episode 5's teaser (I know I shouldn't trust the teaser) Snow has her normal attire on. Plus, Bigby looks like he's in his first wolf form, and looks like he's searching for Snow. Maybe Snow's in danger, or someone was glamoured to look like her(again). Just a hunch.