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Powers and Abilities
Appearance Humanoid with discolored, slimy skin, hollow eyes, and a round mouth with many teeth. Can appear human.
Episode(s) 3.02 The Kids Are Alright
9.13 The Purge (mentioned)

Sam: So, changelings can perfectly mimic children. According to lore, they climb in the window, snatch the kid. There were marks on the windowsill at one of the kid's houses. Looked to me like blood.

Dean: The changeling grabs a kid, assumes its form, joins the happy fam just for kicks?

Sam: Not quite. Changelings feed on the mom: synovial fluid. The moms have these odd bruises on the back of their necks. Changelings can drain them for a few weeks before mom finally croaks.

Sam and Dean, 3.02 The Kids Are Alright


The Katie Doolittle changelings true form as seen through a reflection.

Changelings are humanoid creatures with discolored, slimy skin, hollow eyes, and a round mouth with many teeth. They can appear human, but their true nature is revealed in their reflection. They feed on humans' synovial fluid.[1]

Powers and abilities

  • Shapeshifting – Changelings can appear human, and are capable of shifting between forms in order to feed.[1]
  • Sharp teeth – Changelings have a lamprey-like mouth covered in sharp teeth that allow them to feed on humans.[1]
  • Super strength – Changelings have superior strength compared to humans.[1]


  • Connection to their mother – Killing a mother changeling will cause its children to die instantly.[1]
  • Fire – Setting a changeling on fire will kill it.[1]
  • Mirrors – A changeling's true form is revealed in a mirror.[1]


The Katie Doolittle changeling about to feed.

3.02 The Kids Are Alright

Sam and Dean come across changelings in Cicero, Indiana. The activities of the changelings are orchestrated by a "mother" changeling, who disguises herself as an adult woman. The changelings steal children in the neighborhood from their beds at night and then take the real children's places in their family homes. The real children are kept alive, in cages, in the basement of a house abandoned mid-construction, for the "mother" changeling to feed off.

Meanwhile, the child changelings feed off of the human mothers' synovial fluid by suckling with their round, many-toothed mouths at the back of their necks. The changelings take their place in human homes as soon as they are formed, and feed off the mothers until they waste away. Any other humans who come between the changeling child and its prey are murdered. The mother changeling is finally killed by fire (Sam and Dean use a flamethrower). When the mother is killed, the children are destroyed also.

9.13 The Purge

When Sam and Dean notice suction marks on the backs on victims, changeling is one of the theories Dean goes with. However it is shot down by Sam, as the deaths don't fit the modus operandi of changelings.

Changelings in Lore

In European folklore and folk belief, a changeling is the offspring of a fairy, troll, elf or other legendary creature that has been secretly left in the place of a human child. The apparent changeling could also be a stock or fetch, a glamorized piece of wood that would soon appear to grow sick and die.[2]