Forget the ogres we met on "Lady of the Lake." Take a seat, Cora. Move off to the side, Mr. Gold.

On next Sunday's Once Upon a Time, viewers will be introduced to what ABC is describing at the most evil villain of them all. Perhaps you've heard of him and his unusual hand? Watch the official preview for "The Crocodile" now.

Look for Belle to grow tired of Gold's ways on the installment, threatening to leave him if he doesn't change; while the dwarves mine Storybrooke for fairy dust and we meet Rumplestiltskin's wife, Milah.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.