S10, E12: Looking to get Dean out of the bunker, Sam finds a case for him and Dean to investigate - people are disappearing into thin air with only their clothes left behind. Sam and Dean suspect fairies or angels, but the truth turns out to be much more shocking - Hansel (guest star Mark Acheson), from Hansel and Gretel lore, is kidnapping people and turning them into their younger selves to placate the evil witch (guest star Lesley Nicol). Unfortunately, Dean finds this information out the hard way after he becomes Hansel's next victim and reverts to his 14-year-old self.