Wicked Witch of the West
The Wicked Witch appears as the main antagonist of the second half of Season Three of "Once Upon a Time" played by Rebecca Mader. This version goes by the name of Zelena (which means "green" in some Slavic languages). Zelena is discovered to be the daughter of the Queen of Hearts/the Miller's Daughter/Cora (Barbara Hershey/Rose McGowan), making her the older, long-lost half-sister of Regina the Evil Queen (Lana Parrilla). Zelena visited Rumplestiltskin (Robert Carlyle) and learned from him how to control her own powerful magic. Her storyline revolves around her efforts to create a time-travel spell that will allow her to go back and prevent the birth of Snow White's mother, Ava, who informed Prince Leopold (Cora's fiancé) that Cora was with child to sabotage Cora's attempts to infiltrate the royal family (before she can ruin Zelena's life, and thus Zelena would be raised as royalty. But despite Zelena's efforts to create the deadly time portal Emma Swan (supposedly the only wielder of light magic powerful enough to oppose her) her plans are halted when the Evil Queen masters light magic in time to oppose her (although her time-travel spell is completed, it takes effect after her presumed death, transporting Emma and Captain Hook (Colin O'Donoghue) back to before the original curse was cast). She was later thought to have been killed by Rumpelstiltskin.
Once Upon a Time (season 5)
On November 10, it was announced that Victoria Smurfit would return as Cruella De Vil for numerous episodes during the second half of the season, beginning with the thirteenth episode, "Labor of Love". On November 16, it was announced that Bailee Madison would be returning in the same episode to reprise her role as a young Snow White, joined by newcomers Jonathan Whitesell and Kacey Rohl, who will be portraying Hercules and Megara, respectively. On December 3, 2015, the cast of the mid-season finale, "Swan Song", was revealed with Eric Keenleyside returning as Maurice, Belle's father and Oliver Bell being introduced as a Young Killian. On December 4, it was announced that Rachel Shelley would be reprising her role as Milah, Rumplestiltskin's ex-wife and Hook's ex-lover, for at least one episode in the second half of the season. On December 8, it was announced that the character of Dorothy Gale (previously portrayed by Matreya Scarrwener) will be returning midway through the second half of the season to be portrayed by a new actress, as the character will be aged up to her late 20s-early 30s. On December 18, it was revealed that the recurring role had been recast to Teri Reeves, who will be making her first appearance in the 16th episode of the season. On January 8, 2016, it was announced that the character of Gaston from "Beauty and the Beast" will be reappearing in an upcoming episode in the back-half of the 5B arc. This marks his first appearance since the season one episode "Skin Deep." Wes Brown will be taking over the role from Sage Brocklebank. On February 9, it was announced that Ava Acres and Isabella Blake-Thomas were cast as young versions of Regina and Zelena, respectively. They will appear via flashbacks in the nineteenth episode, "Sisters." On February 18, it was announced that Costas Mandylor will be appearing as Captain Silver, a pirate from Hook's past. On February 23, it was announced that Rya Kihlstedt had been cast as Cleo, Emma's former mentor, in a flashback to a time before Emma became a bail bonds woman. On March 15, it was announced that Sam Witwer and Hank Harris will be appearing in the recurring roles of Jacob and Nathaniel for a mental hospital arc, starting at the end of this season and into the sixth season.