The Black Fairy and Rumple are at the center of episode 19 of Once Upon a Time
season 6, appropriately titled "The Black Fairy." Will Rumple find out why his mother abandoned him all those years ago? And how will that affect him going forward?
The official episode description from ABC says, "In flashback, after Rumple's mother, Fiona, learns from his fairy godmother that his destiny is prophesized, she does everything in her power to keep it from happening. Ultimately, Fiona will have to make a decision that will change the course of both their lives forever. Meanwhile in Storybrooke, Rumple faces a similar dilemma."