4x03 Emma & Hook #2 

ELSA IS BLAMED FOR CASTING AN ICY SPELL ON MARIAN - WHICH COULD ULTIMATELY KILL HER, EMMA AND DAVID CATCH FORMER MERRY MEN MEMBER WILL SCARLET RUMMAGING THROUGH ROBIN HOOD'S TENT, AND IN ARENDELLE OF THE PAST, ELSA AND KRISTOFF MUST STOP HANS FROM ATTEMPTING TO TAKE CONTROL OF THE KINGDOM, ON ABC'S "ONCE UPON A TIME"
Elizabeth Mitchell ("Lost," "Revolution") Guest Stars as the Snow Queen
"Rocky Road" - When an icy spell is cast on Marian, which will ultimately freeze her heart and kill her, the Storybrooke residents place the blame on Elsa. But unbeknownst to anyone, a mysterious woman who runs the town's ice cream parlor has the same powers as Elsa and is trying to frame her. Emma and David find former Merry Men member Will Scarlet rummaging through Robin Hood's tent, Regina teams up with Henry to try and discover who the author of the fairy tale book is, Mary Margaret is having trouble balancing her duties as leader of Storybrooke and mother to young Prince Neal, and Hook begins to suspect that Mr. Gold is still in control of the dagger that calls upon him to be the Dark One. Meanwhile, in Arendelle of the past, Elsa and Kristoff set off to stop Hans from attempting to take control of the kingdom, on "Once Upon a Time," SUNDAY, OCTOBER 12 (8:00-9:00 p.m., ET) on the ABC Television Network.