Walsh, also known as Oz, the Great and Terrible, is a minor character on Once Upon a Time. He is Emma Swan's boyfriend of eight months, however, she ends up murdering him when her true memories are restored and he is revealed to be a flying monkey in disguise, having been a spy for the Wicked Witch of the West.
Before the Curse
Meet Oz, the Great and Terrible. ("It's Not Easy Being Green")
Originally from Kansas, Walsh makes his way to Oz where he becomes known as an all-powerful wizard, "Oz, the Great and Terrible". From behind a curtain, Walsh projects a shadow image and speaks with a booming voice to anyone who approaches his palace to seek an audience with him. He also asks for genuine magical items in exchange for help which he uses to further his deception. He is soon met by a witch named Zelena who is in search of her biological family. Walsh uses one of his magical items to discover that Zelena's mother is a woman named Cora. He also reveals that Zelena has a half-sister, Regina. The sorceress wants to know more, so Walsh gives her a pair of silver heels that can take her anywhere she desires. Zelena uses them to go to the Enchanted Forest. Some time later, Zelena returns, jealous of her sister's life. She asks the wizard to send her back in time so she can stop Cora from abandoning her. Walsh states that even with the most powerful magic, that is not possible. An angry Zelena rips off the curtain and discovers the real Walsh: a simple man who likes orchestrating a false image to put on a good show. Walsh tells Zelena his back story, but the furious witch decides to turn him into a flying monkey, making him her loyal pet. ("It's Not Easy Being Green")
The "wizard" sends Dorothy home. ("Kansas")
Following his transformation, Glinda, the Witch of the South visits Zelena in Emerald City. Glinda thanks Zelena for exposing the wizard for what he really is and that some time as her pet is a fitting punishment. Glinda then welcomes Zelena into her sisterhood of witches, but this doesn't last long as a girl named Dorothy Gale arrives. Zelena grows jealous of the girl, and her true colors start to show. Zelena starts turning green again, and soon enough she is defeated by Dorothy. Rather than become the new Witch of the West, Dorothy only wishes to go home; a desire Glinda grants by taking her back to see the Wizard, who is presumed to have reverted to his old form since Zelena's magic has been undone. The wizard gives Dorothy the silver heels, and the young girl is sent home. However, it is soon revealed that Zelena impersonated that wizard. She then banishes Glinda to the Enchanted Forest. ("Kansas")
After the Second Curse
Walsh proposes to Emma. ("New York City Serenade")
After Emma and Henry leave Storybrooke to live in New York, Emma meets Walsh and they start dating. What Emma doesn't know is that Walsh is a flying monkey that is following orders given to him by Zelena. Several months later, Emma meets Walsh for a date which is crashed by Captain Hook. He sits opposite Emma once Walsh leaves for the bathroom and hands her an address, assuring her that it will provide proof that the memories in her head aren't real. When Walsh returns, he proposes, and a shocked Emma leaves the restaurant, saying that she just needs to time to think about it. She returns home to Henry who tries to give her some advice. Instead of thinking about Walsh's proposal, she meets up with Hook and drinks a potion that returns all of her memories. She is sad to see her perfect end, but knows she must go back to Storybrooke. She tells Walsh that she has to leave for a while, but he doesn't take kindly to this, and begins attacking her, revealing himself to have been a flying monkey in disguise all this time. Emma beats him with a pipe, hitting him off the roof and killing him. ("New York City Serenade")
Promotional poster of the 1939 film adaptation, featuring the Wizard of Oz.
The character of Walsh is based upon the title character of the popular story, "The Wonderful Wizard of Oz". The generalized version of the story tells of a young girl from Kansas, by the name of Dorothy Gale. A tornado transports her and her dog, Toto to the magical land of Oz where she goes on a quest to find the all-powerful wizard that has the ability to send her home. Along the way, she meets and befriends a Scarecrow, Tin Woodman, and Cowardly Lion. The Good Witch of the North gives her a magical pair of silver shoes that had belonged to the Wicked Witch of the East. Once finally reaching the wizard, Dorothy is forced to find and kill the Wicked Witch of the West (Zelena)before being sent home. After performing such task, the Wizard is discovered to be a fraud, but in the end, Dorothy learns that she could have gone home the whole time if only she clicked her shoes together and wished when Glinda, the Good Witch of the South gives her the information she needs. This is the story that the original book presents. However, there are many variations of the original tale. In some versions, Dorothy's shoes are ruby instead of silver, and Glinda is the Witch of the North, not South, (In the original tale there's a Good Witch of the North and a Good Witch of the South.) Also, some versions have Dorothy dreaming all of the Oz events instead of them actually happening, even though it is obvious in the original book series that Oz is intended to be a very real place.In Once Upon a Time, Walsh doubles as the Wizard of Oz (known as Oz, the Great and Terrible or Oscar Diggs) and one of the Wicked Witch's flying monkeys. Several other adaptions of "The Wizard of Oz" have been made over the years.
Gallery of photographic stills released to promote the character.