Ep 18. The Stable Boy

"In the fairytale world, young Cora is in love with a prince but is forced to marry a wealthy but abusive man. In an attempt to gain power and escape her unhappy life, she forms a dark alliance with Rumplestiltskin. Meanwhile, in present-day Storybrooke, Emma begins to investigate the circumstances surrounding Kathryn's disappearance and becomes suspicious of Regina's involvement. While trying to find evidence, Emma learns more about Regina's past and a shocking revelation about David's past life is uncovered. As the two timelines converge, the truth behind the events in the fairytale world and Storybrooke are revealed."