An Apple Red as Blood
Once Upon a Time Season 1 Episode 21 (05/06/12)
-Regina plots to kill Emma even though Mr. Gold says her death will break the curse. Regina calls upon the Mad Hatter to bring her poison apple back from the fairy tale world.
-Emma offers to leave Storybrooke because she thinks it's best for Henry. She tells Regina she only wants visitation rights. In return, Regina offers her an apple tart made from her poison fruit.
-When Henry sees the tart he tells Emma it's poisonous but she doesn't believe him so he eats it and collapses.
-In the fairy tale world, Snow tries to rescue Charming but the Evil Queen has captured him. She tells Snow she can either eat the poisonous apple or the Queen will kill Charming.
-Snow eats the apple and collapses.