Zelena (Once Upon a Time)
In December 2013, Rebecca Mader was cast as the Wicked Witch of the West. She made multiple appearances during the second half of season three and was promoted to a series regular for the show's fifth season. The role of the Wicked Witch of the West was written specifically for Rebecca Mader. It was announced that the writers had chosen not to continue with Zelena's storyline and Mader would not be returning for the seventh season of the show. However, Mader later revealed that she would be returning for multiple season seven episodes.
A Tale of Two Sisters (Once Upon a Time)
"A Tale of Two Sisters" is the first episode of the fourth season of the American fantasy drama series "Once Upon a Time", which aired on September 28, 2014. The episode introduces several characters from "Frozen" to the series. The episode also has the characters deal with the consequences of Emma Swan (Jennifer Morrison) and Killian "Hook" Jones's (Colin O'Donoghue) time traveling in the third season finale.