Gossip Girl's
Sebastian Stan will finally make his long-awaited debut as
Alice in Wonderland's Mad Hatter on this Sunday's episode of
Once Upon a Time. And we've got an exclusive sneak peek!
First Look: Sebastian Stan goes Mad on Once Upon a Time While we'll learn how the Mad Hatter became, well, mad in Wonderland, his real-world counterpart, Jefferson, is just as eccentric. Surprisingly...
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