The scene entailed Elizabeth Mitchell in full Snow Queen garb showing up thru a mystery door in the middle of a major metropolis (I suspect NYC) in the 1980s. Background people were supplied with a variety of 1980s style clothes and possessions such as walkmans & brick cell phones. Of course solidifying the 1980s theme.... the TRON poster (Eddie Kitsis & Adam Horowitz wrote the 2010 version) cleverly placed behind where they were shooting.
Once Upon A Time has nominations in several 2014 Best Of TV Awards categories which voting has begun on here.
Once Upon A Time can be seen Sunday nights on ABC in the U.S. and on CTV in Canada.