Lana Parrilla, John Pyper-Ferguson, JAMIE DORNAN Photo

From: Photo Flash: This Week's All New ONCE UPON A TIME

On this week's all new episode of ABC's ONCE UPON A TIME, titled 'Welcome to Storybrooke,' Emma, David and Mr. Gold must protect Mary Margaret against Regina, who is out for Revenge and has made it her mission to kill Mary; and Henry, fed up with all of the feuding, devises a plan to put an end to magic. Meanwhile, Regina discovers that a father and son have somehow found their way into her allegedly undetectable town as she and the fairytale characters deal with the effects of the newly cast curse 28 years prior, on SUNDAY, MARCH 17 (8:00-9:00 p.m., ET) on ABC.