Once Upon a Time (2011)

S5E1 The Dark Swan

As soon as Emma embraces her role as the Dark One, she vanishes, prompting the heroes to unite in their quest to rescue her. Their first challenge is locating her, which leads them to seek assistance from an unexpected ally. Meanwhile, in the Enchanted Forest, Emma battles her emerging dark instincts while on a mission to find Merlin, hoping he can reverse her transformation. On her journey to Camelot, she receives support from the fearless warrior princess Merida, along with King Arthur and his Knights of the Round Table.