How can Emma take down Regina? What does Snow White's father want for his birthday?

These are just two of the questions touched upon in the following Once Upon a Time clips, both courtesy of this Sunday's "Fruit of the Poisonous Tree."

Look for Mary Margaret and David to keep up their secret rendezvous on the installment, as well, while King Leopold is faced with what appears to be a dream scenario in the fairy tale world: three wishes from a genie. But you know what they say about getting what you wish for, right?

Watch a pair of sneak peek from the episode now:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.