Once Upon a Time Season 1 Episode 17 : Hat Trick

Mary Margaret suddenly disappears without a trace and Emma is kidnapped by the psychopathic Jefferson – a man with a strange obsession for hats on the verge of madness – while the Mad Hatter's backstory is revealed along with a secret mission authorized by the Evil Queen to travel to Wonderland and steal a prized artifact from the Queen of Hearts. At the conclusion of the episode, Emma rescues Mary Margaret from Jefferson - who disappears after b...