Board Thread:General Discussion/@comment-28883990-20160629232119/@comment-4453062-20160630005521

Totally making my own guess, but maybe it had to do with all of Storybrooke's magic being tethered to the crystal? So once Henry took the crystal with him outside SB, the townline no longer prevented people from leaving or returning? I mean it would especially make sense in some ways, since if Storybrooke no longer had magic for an extended portion of the finale, then there would be no magical force preventing them from crossing over.