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.
Scarecrow (Oz)
The Scarecrow appeared in the "Once Upon a Time" episode "Our Decay" voiced by Paul Scheer. Many years ago, Zelena the Wicked Witch of the West targeted him for his brain as part of her attempt to create a time-travel spell. Before she can remove Scarecrow's brain, Dorothy and Toto arrived where they managed to get away from Zelena. With help from Hades who enchanted a bicycle that was found at the remains of Dorothy's house, Zelena was able to locate where Dorothy and Scarecrow are hiding. After magically freezing Dorothy, Zelena successfully removed Scarecrow's brain and was about to show it to Hades only to find that he is not there.