Board Thread:Spoilers!/@comment-27060727-20170218051023/@comment-24304025-20170424172058

I'm guessing the World Behind the Mirror will play a part in this episode. The mention of the Dragon a few episodes ago was great, but I feel it was touched upon for more than just a tiny callback. I'm guessing Sidney's appearance might indicate Regina has a plan against the Black Fairy that involves mirrors or they plan to use Sidney to communicate via mirror with someone in a different realm (perhaps the Apprentice to talk about Henry's author thing?).