What kind of beast steals a child from its parents?
Jack is an episodic character on Once Upon a Time. The husband of Jill, he and his wife have their newborn son briefly stolen from them by Rumplestiltskin. It's only when Belle rescues and returns the child that Jack and Jill are able to be happy and return to their normal lives.
Before the Curse
Jack and Jill are reunited with their son. ("Changelings")
Jack and Jill, two peasants of the Enchanted Forest, one day conceive a son together. This doesn't go according to plan though, for the child is eventually kidnapped by Rumplestiltskin to be sacrificed to the Black Fairy, devastating the couple. Rumple's maid, Belle, soon learns of this though, and with some help from the Blue Fairy, she is able to save the child before it's too late. When Rumple's meeting with the Black Fairy doesn't go how he wanted it to, he permits Belle to return the child to Jack and Jill, and he watches from afar as Belle does just that. The two parents are ever-so-grateful to Belle as Jill takes the child in her arms and Jack hugs Belle to thank her. ("Changelings")