bu"Under the Dome" Episode 2.01 - "Heads Will Roll"u (airs 63014; 10-11 PM)b br iBarbie’s (Mike Vogel) fate lies in Big Jim’s (Dean Norris) hands, and the Dome presents a new threat when it becomes magnetized. Meanwhile, Julia (Rachelle Lefevre) seeks out the help of a stranger to save the life of a mysterious girl who may hold clues to origin of the Dome.