Jefferson, also known as the Mad HattJefferson, also known as the Mad Hatter, is a character on ABC's Once Upon a Time. He débuts in the seventeenth episode of the first season. He is portrayed by guest star Sebastian Stan, and is the Enchanted Forest counterpart of Jefferson. Jefferson is one of few characters from the first Dark Curse who is confirmed to have the same real name in Storybrooke as his Enchanted Forest counterpart; the others being Regina, David and Reul Ghorm (Mother Superior).
