Going to the Emerald City

This is yet again another Dorothy finds out the past Fiyero gets discovered by the Tin Man blah blah blah. Dorothy is interested to know the way Oz was before the Wicked Witch of the West came to be. Fortunately for her Glinda was able to conjure up a spell for she can send the four friends to the past.
disclaimer I don't own these characters nor the story of WIcked.