A Three Year-Old Girl, a Colony of Dogs, and One Very Rare Side Effect

Mathilda Crisp at home in Pasadena, CA with the stuffed bear she's had since she started experiencing mysterious symptoms at age three.
( Mary Harris/WNYC )
Music Credits: "Mathilda's Theme" by Cayce Means , "The Man Says - Instrumental" by Ruby Velle & The Soulphonics , "Space Drums" by Cayce Means , "Undersea Garden" by Podington Bear , "Lake Victoria" by Podington Bear , "Saver" by Podington Bear , "Back Stairs" by Podington Bear , "Stingray Theme" by Blue Dot Sessions , "Used Me Again (Now Lose Me Forever) - Instrumental" by Ruby Velle
WNYC Studios