'Once Upon a Time' Episode 21 Photos: 'An Apple Red as Blood'

Henry begs Emma to stay in Storybrooke to save the fairytale characters, but Regina has a plan to get rid of Emma forever. Meanwhile in fairytale land, Snow White gathers her allies in a quest to save Prince Charming from the Evil Queen. "An Apple Red as Blood" airs on Sunday, May 6 at 8pm on ABC.